# A012107 (b-file synthesized from sequence entry)
0 1
1 4
2 84
3 4432
4 432144
5 67336512
6 15330202432
7 4799825862912
8 1978228668612864
9 1038257514383795200
10 676117122084133770240
11 534973800492211106598912
12 505535479689176978173726720