# A084940 (b-file synthesized from sequence entry)
0 1
1 1
2 7
3 126
4 4284
5 235620
6 19085220
7 2137544640
8 316356606720
9 59791398670080
10 14050978687468800
11 4018579904616076800
12 1374354327378698265600
13 553864793933615401036800
14 259762588354865623086259200