# A056590 (b-file synthesized from sequence entry)
0 1
1 7
2 53
3 318
4 1784
5 9288
6 46233
7 221859
8 1036585
9 4742650
10 21350264
11 94895016
12 417562385
13 1822824255
14 7907350365
15 34130697462
16 146735898760
17 628870859320
18 2688466352825
19 11470754475675
20 48865641344081
21 207913415718642