You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

7 lines
130 B
PHP

<?php
/*
* Gnieark's anwser to euler problem 15
* https://projecteuler.net/problem=15
*/
echo gmp_fact(2*20)/pow(gmp_fact(20),2);