# A173115 (b-file synthesized from sequence entry)
0 0
1 24
2 2400
3 235224
4 23049600
5 2258625624
6 221322261600
7 21687323011224
8 2125136332838400
9 208241673295152024
10 20405558846592060000
11 1999536525292726728024
12 195934173919840627286400