Needlessly Provoking Marsupials

# npm

## @stdlib/math-base-special-nonfibonacci

0.0.5 • Public • Published

# Non-Fibonacci

Compute the nth non-Fibonacci number.

The nth non-Fibonacci number is given by

where `φ` is the golden ratio.

## Installation

`npm install @stdlib/math-base-special-nonfibonacci`

## Usage

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

#### nonfibonacci( n )

Computes the nth non-Fibonacci number.

```var v = nonfibonacci( 1 );
// returns 4

v = nonfibonacci( 2 );
// returns 6

v = nonfibonacci( 3 );
// returns 7```

If provided either a non-integer or `n < 1`, the function returns `NaN`.

```var v = nonfibonacci( -1 );
// returns NaN

v = nonfibonacci( 3.14 );
// returns NaN```

If provided `NaN`, the function returns `NaN`.

```var v = nonfibonacci( NaN );
// returns NaN```

## Examples

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

var v;
var i;

for ( i = 1; i < 100; i++ ) {
v = nonfibonacci( i );
console.log( 'nonfibonacci(%d) = %d', i, 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.

## Keywords

### Install

`npm i @stdlib/math-base-special-nonfibonacci`

stdlib.io

14

0.0.5

Apache-2.0

51.5 kB

10