# A274256 (b-file synthesized from sequence entry)
0 1
1 5
2 70
3 1696
4 49493
5 1593861
6 54591225
7 1950653202
8 71889214644
9 2712628146949
10 104277713515456
11 4069334248174800
12 160785480249706192
13 6419443865094494044
14 258585021917711797850
15 10496205397574996367474
16 428899108081734423242550
17 17628723180468295514015268
18 728347675604866545590505024