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

    negaFibonacci

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    Compute the nth negaFibonacci number.

    The negaFibonacci numbers are the integer sequence

    NegaFibonacci sequence

    The sequence is defined by the recurrence relation

    NegaFibonacci sequence recurrence relation

    which yields

    NegaFibonacci relationship to Fibonacci numbers

    with seed values F_0 = 0 and F_{-1} = 1.

    Installation

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

    Usage

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

    negafibonacci( n )

    Computes the nth negaFibonacci number.

    var v = negafibonacci( 0 );
    // returns 0
    
    v = negafibonacci( -1 );
    // returns 1
    
    v = negafibonacci( -2 );
    // returns -1
    
    v = negafibonacci( -3 );
    // returns 2
    
    v = negafibonacci( -78 );
    // returns -8944394323791464

    If n < -78, the function returns NaN, as larger negaFibonacci numbers cannot be safely represented in double-precision floating-point format.

    var v = negafibonacci( -79 );
    // returns NaN

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

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

    If provided NaN, the function returns NaN.

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

    Examples

    var negafibonacci = require( '@stdlib/math-base-special-negafibonacci' );
    
    var v;
    var i;
    
    for ( i = 0; i > -79; i-- ) {
        v = negafibonacci( 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-negafibonacci

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    10

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    57.2 kB

    Total Files

    13

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser