# A069788 (b-file synthesized from sequence entry)
1 2
2 54
3 4320
4 2500000
5 5252187500
6 68336412238080
7 3507134014317846528
8 1039468958911770833166336
9 1271288794044247678785011427072
10 8629570422218326431392139107794299444
11 248662702551142788293946930136251315440514048
12 38763625610496798571986566181715696354290667009540096