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{{alias}}( n )
Computes the nth negaLucas number.
The negaLucas numbers follow the recurrence relation
L_{n-2} = L_{n} - L_{n-1}
with seed values L_0 = 2 and L_{-1} = -1.
If `|n|` is greater than `76`, the function returns `NaN` as larger
negaLucas numbers cannot be accurately represented due to limitations of
double-precision floating-point format.
If not provided a non-positive integer value, the function returns `NaN`.
If provided `NaN`, the function returns `NaN`.
Parameters
----------
n: integer
Input value.
Returns
-------
y: integer
NegaLucas number.
Examples
--------
> var y = {{alias}}( 0 )
2
> y = {{alias}}( -1 )
-1
> y = {{alias}}( -2 )
3
> y = {{alias}}( -3 )
-4
> y = {{alias}}( -4 )
7
> y = {{alias}}( -77 )
NaN
> y = {{alias}}( -78 )
NaN
> y = {{alias}}( NaN )
NaN
See Also
--------
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