function coefficients( n ) {
	var coefs;
	var i;

	coefs = cache[ n ];
	if ( coefs === void 0 ) {
		coefs = [];
		for ( i = 0; i < n; i++ ) {
			coefs.push( 0.0 );
		}
		for ( i = n-1; i >= 0; i -= 2 ) {
			coefs[ i ] = binomcoef( (n+i-1)/2, i );
		}
		// Memoize the coefficients:
		cache[ n ] = coefs;
	}
	return coefs;
}
Computes polynomial coefficients.

@private
@param {NonNegativeInteger} n - Fibonacci polynomial for which to compute coefficients
@returns {NonNegativeIntegerArray} polynomial coefficients