# A024250 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 24
4 416
5 17152
6 996352
7 74691456
8 7245522944
9 896234266624
10 137930480164864
11 25825353123102720
12 5777805863334576128
13 1522101710704028188672
14 466366128918332878225408