26 Numerics library [numerics]

26.8 Mathematical functions for floating-point types [c.math]

26.8.6 Mathematical special functions [sf.cmath] Laguerre polynomials [sf.cmath.laguerre]

double laguerre(unsigned n, double x); float laguerref(unsigned n, float x); long double laguerrel(unsigned n, long double x);
Effects: These functions compute the Laguerre polynomials of their respective arguments n and x.
where n is n and x is x.
Remarks: The effect of calling each of these functions is implementation-defined if n >= 128.