# A003048 (b-file synthesized from sequence entry)
1 1
2 2
3 3
4 10
5 39
6 196
7 1175
8 8226
9 65807
10 592264
11 5922639
12 65149030
13 781788359
14 10163248668
15 142285481351
16 2134282220266
17 34148515524255
18 580524763912336
19 10449445750422047
20 198539469258018894