# A162161 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 13
4 73
5 561
6 5251
7 57583
8 739089
9 10794241
10 176570371
11 3209512791
12 64116701353
13 1396247370961
14 32941566738627
15 836962322583871
16 22785381648804001
17 661810614930630273
18 20428823103775758595