# A013087 (b-file synthesized from sequence entry)
0 2
1 16
2 530
3 37840
4 4665890
5 880829200
6 236051798450
7 85184059714000
8 39823482623005250
9 23410203659063338000
10 16900988192636551591250
11 14700311020824054699970000
12 15161633552176216519055281250