# A224900 (b-file synthesized from sequence entry)
0 1
1 4
2 72
3 3456
4 345600
5 62208000
6 18289152000
7 8193540096000
8 5309413982208000
9 4778472583987200000
10 5781951826624512000000
11 9158611693373227008000000
12 18573664514160904372224000000
13 47325697182081984340426752000000
14 149075946123558250672344268800000000