# A124009 (b-file synthesized from sequence entry)
0 0
1 0
2 216
3 49464
4 23123880
5 19180338840
6 25791442770240
7 52614269909090064
8 154809621283047068016
9 631429039396055199165840
10 3457808596178310768284115720
11 24763433580060911383347280813320