# A037615 (b-file synthesized from sequence entry)
1 1
2 11
3 90
4 721
5 5771
6 46170
7 369361
8 2954891
9 23639130
10 189113041
11 1512904331
12 12103234650
13 96825877201
14 774607017611
15 6196856140890
16 49574849127121
17 396598793016971
18 3172790344135770
19 25382322753086161
20 203058582024689291
21 1624468656197514330