# A255492 (b-file synthesized from sequence entry)
0 1
1 20
2 492
3 9288
4 163504
5 2616064
6 39369649
7 561744656
8 7690052788
9 101717711304
10 1308089742576
11 16431681189504
12 202396884008657
13 2452192780001276
14 29299135239719708
15 345967823847659992
16 4044638027348853616
17 46886410125951835648
18 539632277597240357409