# A179870 (b-file synthesized from sequence entry)
1 4
2 36
3 2304
4 518400
5 298598400
6 365783040000
7 842764124160000
8 3344930808791040000
9 21407557176262656000000
10 209815467884550291456000000
11 3021342737537524196966400000000
12 61783437639904832303765913600000000