# A000154 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 7
4 35
5 228
6 1834
7 17382
8 195866
9 2487832
10 35499576
11 562356672
12 9794156448
13 186025364016
14 3826961710272
15 84775065603888
16 2011929826983504