# A125857 (b-file synthesized from sequence entry)
1 0
2 2
3 20
4 182
5 1640
6 14762
7 132860
8 1195742
9 10761680
10 96855122
11 871696100
12 7845264902
13 70607384120
14 635466457082
15 5719198113740
16 51472783023662
17 463255047212960
18 4169295424916642
19 37523658824249780
20 337712929418248022