# A165231 (b-file synthesized from sequence entry)
0 1
1 8
2 120
3 1856
4 28736
5 444928
6 6888960
7 106663936
8 1651511296
9 25570869248
10 395921817600
11 6130182127616
12 94915539501056
13 1469607174995968
14 22754390483927040
15 352313390342864896
16 5454979121614422016