# A335181 (b-file synthesized from sequence entry)
0 1
1 3
2 18
3 2268
4 13608
5 1857492
6 133739424
7 53362030176
8 640344362112
9 561902177753280
10 23599891465637760
11 17558319250434493440
12 442469645110949234688
13 6065595130003447583720448
14 2547549954601447985162588160
15 985901832430760370257921617920
16 23661643978338248886190118830080