# A157864 (b-file synthesized from sequence entry)
0 1
1 17
2 72
3 2431
4 5112
5 85697
6 357912
7 23835887
8 24721272
9 408926687
10 1685915352
11 55444767181
12 113654162232
13 1859089273877
14 7584695511192
15 988081196223199
16 501829640287992
17 8141400285401267
18 32967597006585432
19 1066454822660748331
20 2153382250687098552