# A027310 (b-file synthesized from sequence entry)
1 1
2 10
3 84
4 691
5 5625
6 45891
7 375627
8 3087869
9 25492266
10 211320955
11 1758522205
12 14686149360
13 123057387973
14 1034283033735
15 8717735547615
16 73673259617948
17 624130742851351
18 5299391600814357
19 45091368351899283
20 384429112020570375