# A028917 (b-file synthesized from sequence entry)
1 1
2 105
3 50400
4 64864800
5 174356582400
6 844757641728000
7 6690480522485760000
8 80787552309015552000000
9 1411520113943119724544000000
10 34261827725741345073856512000000
11 1118306056968197503210676551680000000
12 47790809344535920299708262436044800000000