# A125409 (b-file synthesized from sequence entry)
0 1
1 21
2 231
3 2121
4 22547
5 244601
6 2714271
7 30517333
8 346395491
9 3958011609
10 45437784111
11 523343937005
12 6041702589491
13 69860441606457
14 808706293207743
15 9368913912846221
16 108598284502838979
17 1259272889680954201