# A053718 (b-file synthesized from sequence entry)
1 1
2 4
3 64
4 4096
5 423616
6 128802304
7 131119611904
8 431739985985536
9 2759629471089688576
10 52225410257290195369984
11 3239317987292851928169447424
12 621439868364968017851608618500096