# A131842 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 20
5 96
6 582
7 4672
8 47330
9 595680
10 9088942
11 164702708
12 3483060060
13 84705352206
14 2339732572312
15 72635597193630
16 2511496037777828
17 95965484116697442
18 4024669707807276532
19 184149183428282681030
20 9143767110701151656280