# A028136 (b-file synthesized from sequence entry)
0 1
1 28
2 500
3 7280
4 94416
5 1138368
6 13069120
7 144981760
8 1569049856
9 16674065408
10 174788490240
11 1813347594240
12 18663674269696
13 190917377179648
14 1943653403279360
15 19713779492126720
16 199364213335719936