# A028220 (b-file synthesized from sequence entry)
0 1
1 35
2 770
3 13630
4 212331
5 3041745
6 41087740
7 531634460
8 6658867061
9 81336796255
10 974120693910
11 11484949238490
12 133713902876191
13 1540987906351565
14 17612518552867280
15 199940810374681720
16 2257196040059471721
17 25366166559007515675
18 283993639507153095850