# A085374 (b-file synthesized from sequence entry)
0 1
1 12
2 100
3 700
4 4410
5 25872
6 144144
7 772200
8 4011150
9 20323160
10 100876776
11 492156392
12 2366136500
13 11232648000
14 52739956800
15 245240799120
16 1130632213590
17 5172827121000
18 23504600427000
19 106141827191400