# A012099 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 3
4 9
5 41
6 201
7 1403
8 9649
9 90641
10 809201
11 9578803
12 105268089
13 1504717241
14 19650225401
15 329275068203
16 4982657935329
17 95780865239841
18 1648151554792801
19 35749976635509603
20 689411371817131369