# A088120 (b-file synthesized from sequence entry)
1 2
2 3
3 7
4 107
5 947
6 20161
7 604801
8 6652801
9 726485761
10 39916801
11 39916801
12 316234143227
13 14820309504001
14 10461394944001
15 641171050071552001
16 425757851430912001
17 9366672731480064001
18 8515157028618240001