# A020550 (b-file synthesized from sequence entry)
0 3
1 3
2 12
3 228
4 13872
5 1728240
6 373249440
7 128024074080
8 65548320848640
9 47784725840597760
10 47784725839879257600
11 63601470092869711833600
12 109903340320478725054003200
13 241457638684091756851366041600