# A012197 (b-file synthesized from sequence entry)
0 1
1 0
2 4
3 136
4 1744
5 652864
6 16365504
7 12624963456
8 910310355200
9 735663001262080
10 125940707707991040
11 105433974790312437760
12 34875639805462923857920
13 32117899260249401371770880