# A087751 (b-file synthesized from sequence entry)
0 0
1 1
2 7
3 56
4 538
5 6124
6 81048
7 1226112
8 20902992
9 396857376
10 8308373760
11 190212376320
12 4728556327680
13 126865966625280
14 3654264347274240
15 112484501485977600
16 3685202487258163200
17 128039255560187596800