# A147630 (b-file synthesized from sequence entry)
1 1
2 6
3 90
4 2160
5 71280
6 2993760
7 152681760
8 9160905600
9 632102486400
10 49303993939200
11 4289447472710400
12 411786957380198400
13 43237630524920832000
14 4929089879840974848000
15 606278055220439906304000
16 80028703289098067632128000
17 11284047163762827536130048000