# A124079 (b-file synthesized from sequence entry)
0 1
1 11
2 137
3 2178
4 42774
5 1004532
6 27503832
7 860945040
8 30342400560
9 1189277851680
10 51324077044800
11 2418504655996800
12 123569793528249600
13 6804789307610918400
14 401797276566253747200
15 25323878997135577958400