# A168404 (b-file synthesized from sequence entry)
0 1
1 2
2 16
3 528
4 67584
5 34210304
6 69391122432
7 565356426987520
8 18478277930015260672
9 2419401354886413876592640
10 1267940756758206239694099841024
11 2658665157828553829995392867121496064