# A012727 (b-file synthesized from sequence entry)
0 1
1 2
2 12
3 328
4 13328
5 1160352
6 123701952
7 22207125120
8 4532782825728
9 1380071532433920
10 459909185638812672
11 212375023941305272320
12 104929881035116227072000
13 68350141067274779587092480