About stdlib...
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, wellwritten, studied, documented, tested, measured, and highquality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
iterNegaLucasSeq
Create an iterator which generates a negaLucas sequence.
The negaLucas numbers are the integer sequence
>The sequence is defined by the recurrence relation
which yields
with seed values L_0 = 2
and L_{1} = 1
.
Installation
npm install @stdlib/mathitersequencesnegalucas
Usage
var iterNegaLucasSeq = require( '@stdlib/mathitersequencesnegalucas' );
iterNegaLucasSeq( [options] )
Returns an iterator which generates a negaLucas sequence.
var it = iterNegaLucasSeq();
// returns <Object>
var v = it.next().value;
// returns 2
v = it.next().value;
// returns 1
v = it.next().value;
// returns 3
// ...
The returned iterator protocolcompliant object has the following properties:

next: function which returns an iterator protocolcompliant object containing the next iterated value (if one exists) assigned to a
value
property and adone
property having aboolean
value indicating whether the iterator is finished.  return: function which closes an iterator and returns a single (optional) argument in an iterator protocolcompliant object.
The function supports the following options
:

iter: number of iterations. Default:
77
.
The returned iterator can only generate the first 77
negaLucas numbers, as larger negaLucas numbers cannot be safely represented in doubleprecision floatingpoint format. By default, the function returns an iterator which generates all 77
numbers. To limit the number of iterations, set the iter
option.
var opts = {
'iter': 2
};
var it = iterNegaLucasSeq( opts );
// returns <Object>
var v = it.next().value;
// returns 2
v = it.next().value;
// returns 1
var bool = it.next().done;
// returns true
Notes
 If an environment supports
Symbol.iterator
, the returned iterator is iterable.
Examples
var iterNegaLucasSeq = require( '@stdlib/mathitersequencesnegalucas' );
// Create an iterator:
var it = iterNegaLucasSeq();
// Perform manual iteration...
var v;
while ( true ) {
v = it.next();
if ( v.done ) {
break;
}
console.log( v.value );
}
See Also

@stdlib/mathbase/special/negalucas
: compute the nth negaLucas number. 
@stdlib/mathiter/sequences/lucas
: create an iterator which generates a Lucas sequence. 
@stdlib/mathiter/sequences/negafibonacci
: create an iterator which generates a negaFibonacci sequence.
Notice
This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
Community
License
See LICENSE.
Copyright
Copyright © 20162024. The Stdlib Authors.