# A156325 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 34
4 482
5 10056
6 286372
7 10591372
8 491169996
9 27826318000
10 1887581200256
11 150885500428224
12 14028718134958936
13 1500672248541122944
14 182987661921689610000
15 25231215606822797450176