# A373685 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 7
4 73
5 301
6 1561
7 32131
8 306097
9 2062873
10 43102801
11 720515071
12 7245589561
13 136364378437
14 3259345980073
15 47903339552251
16 873735377165281
17 25383884535029041
18 515592396859327777
19 10003196649764818423
20 316630570292623967401
21 8359224513085985870941