function nonfibonaccif( n ) {
	if ( isIntegerf( n ) === false ) {
		return NaN;
	}
	return addon( n );
}
Computes the nth non-Fibonacci single-precision floating-point number.

@private
@param {NonNegativeInteger} n - the non-Fibonacci number to compute
@returns {NonNegativeInteger} non-Fibonacci number

@example
var v = nonfibonaccif( 1 );
// returns 4

@example
var v = nonfibonaccif( 2 );
// returns 6

@example
var v = nonfibonaccif( 3 );
// returns 7

@example
var v = nonfibonaccif( NaN );
// returns NaN

@example
var v = nonfibonaccif( 3.14 );
// returns NaN

@example
var v = nonfibonaccif( -1 );
// returns NaN