# A037190 (b-file synthesized from sequence entry)
0 1
1 0
2 792
3 16704
4 573480
5 6289344
6 47367288
7 256779072
8 1116635400
9 4092791616
10 12993723216
11 37059359040
12 96956352072
13 232789209984
14 526238331840
15 1128121363008
16 2286165374280
17 4451600668032
18 8386296787224
19 15130668404160
20 26614226534832
21 45684867221568