# A049215 (b-file synthesized from sequence entry)
0 1
1 40
2 2464
3 229760
4 30633856
5 5561407488
6 1322489954304
7 399463775797248
8 149519094622027776
9 67960463478175825920
10 36884466463352967659520
11 23566236397584291201024000
12 17511732541318788803985408000