# A087292 (b-file synthesized from sequence entry)
0 0
1 24
2 384
3 4056
4 38400
5 351384
6 3179904
7 28671576
8 258201600
9 2324286744
10 20919997824
11 188284231896
12 1694570841600
13 15251175838104
14 137260697334144
15 1235346620381016
16 11118120616550400
17 100063088648317464
18 900567807132948864
19 8105110292090814936