# A012081 (b-file synthesized from sequence entry)
0 1
1 2
2 24
3 888
4 68352
5 8853888
6 1724221056
7 470304668928
8 171029448056832
9 79950698284462080
10 46709069479002931200
11 33347332565041919950848
12 28565775294718770340331520
13 28915860353300526164581613568