Problem 45298. How many ways?

Solution 2120427

Submitted on 6 Feb 2020 by Tim

This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test	Status	Code Input and Output
1	Pass	n = 3; y_correct = 1; assert(isequal( how_many(n),y_correct))
2	Pass	n = 4; y_correct = 2; assert(isequal( how_many(n),y_correct))
3	Pass	n = 6; y_correct = 14; assert(isequal( how_many(n),y_correct))
4	Pass	n = 8; y_correct = 132; assert(isequal( how_many(n),y_correct))
5	Pass	n = 9; y_correct = 429; assert(isequal( how_many(n),y_correct))
6	Pass	n = 12; y_correct = 16796; assert(isequal( how_many(n),y_correct))
7	Pass	n = 15; y_correct = 742900; assert(isequal( how_many(n),y_correct))
8	Pass	n = 20; y_correct = 477638700; assert(isequal( how_many(n),y_correct))