# A356566 (b-file synthesized from sequence entry)
0 1
1 0
2 2
3 9
4 92
5 510
6 7074
7 68040
8 1002224
9 12529944
10 228706920
11 3565888920
12 71035245192
13 1348127454960
14 30270949077264
15 661700017709640
16 16516072112482560
17 408336559236083520
18 11204399270843020224
19 309489391954850336640
20 9258803420755891835520