# A232974 (b-file synthesized from sequence entry)
0 1
1 2
2 2
3 10
4 66
5 538
6 5170
7 56906
8 704226
9 9671930
10 145992338
11 2403271594
12 42869336130
13 824103252058
14 16991417367538
15 374154425946890
16 8765990409737634
17 217771226025864122
18 5718895163944768850
19 158315176568802482794
20 4608155971186431515394