# A274081 (b-file synthesized from sequence entry)
0 1
1 5
2 560
3 277200
4 369969600
5 1040623584000
6 5318844410880000
7 44743448895425280000
8 577102758498249984000000
9 10821132329283106871040000000
10 283002122589833107696435200000000
11 9986037506585076241055342592000000000
12 462684151212030123561950840428953600000000