# A338077 (b-file synthesized from sequence entry)
0 1
1 9
2 126
3 2310
4 47250
5 1027026
6 23207184
7 538748496
8 12757863690
9 306752696250
10 7465133615940
11 183458150153460
12 4545211223957040
13 113378500045162800
14 2844670649392440000
15 71731904712206892480
16 1816739665054871280570
17 46189610653753780435530
18 1178358502858339948645500