# A178920 (b-file synthesized from sequence entry)
0 1
1 4
2 39
3 616
4 13445
5 374976
6 12738523
7 510366592
8 23561390889
9 1231594508800
10 71902556218031
11 4637321353737216
12 327439395476545261
13 25123251004703358976
14 2081326422827575699875