# A143002 (b-file synthesized from sequence entry)
0 0
1 1
2 21
3 751
4 38500
5 2617756
6 225629712
7 23924915568
8 3053853073152
9 461404969871616
10 81403191005875200
11 16580318776579814400
12 3861255442546368921600
13 1019529192596773592678400