# A241590 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 64
4 250
5 1728
6 67228
7 2097152
8 1062882
9 80000000
10 9431790764
11 6115295232
12 7168641576148
13 64793042714624
14 2562890625000
15 1152921504606846976
16 5724846103019631586
17 666334875701477376
18 21921547431139208743756
19 16777216000000000000000
20 164839190645167033716
21 513039635408293850333052928