@stdlib/math-base-special-negalucas
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    0.0.5 • Public • Published

    negaLucas

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    Compute the nth negaLucas number.

    The negaLucas numbers are the integer sequence

    NegaLucas sequence

    The sequence is defined by the recurrence relation

    NegaLucas sequence recurrence relation

    which yields

    NegaLucas relationship to Lucas numbers

    with seed values L_0 = 2 and L_{-1} = -1.

    Installation

    npm install @stdlib/math-base-special-negalucas

    Usage

    var negalucas = require( '@stdlib/math-base-special-negalucas' );

    negalucas( n )

    Computes the nth negaLucas number.

    var v = negalucas( 0 );
    // returns 2
    
    v = negalucas( -1 );
    // returns -1
    
    v = negalucas( -2 );
    // returns 3
    
    v = negalucas( -3 );
    // returns -4
    
    v = negalucas( -76 );
    // returns 7639424778862807

    If n < -76, the function returns NaN, as larger negaLucas numbers cannot be safely represented in double-precision floating-point format.

    var v = negalucas( -77 );
    // returns NaN

    If not provided a nonpositive integer value, the function returns NaN.

    var v = negalucas( -3.14 );
    // returns NaN
    
    v = negalucas( 1 );
    // returns NaN

    If provided NaN, the function returns NaN.

    var v = negalucas( NaN );
    // returns NaN

    Examples

    var negalucas = require( '@stdlib/math-base-special-negalucas' );
    
    var v;
    var i;
    
    for ( i = 0; i > -77; i-- ) {
        v = negalucas( i );
        console.log( v );
    }

    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.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-negalucas

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    13

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    56.2 kB

    Total Files

    13

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser