# A032071 (b-file synthesized from sequence entry)
1 4
2 12
3 144
4 2880
5 57600
6 1451520
7 40642560
8 1316044800
9 47377612800
10 1900678348800
11 83629847347200
12 4017175658496000
13 208893134241792000
14 11700158011224883200
15 702009480673492992000