# A049463 (b-file synthesized from sequence entry)
2 1
3 2
4 7
5 34
6 219
7 1787
8 17936
9 216169
10 3069552
11 50562672
12 953877927
13 20389082457
14 489301660818
15 13080166471127
16 386841424466953
17 12581201258360820
18 447574544428423114
19 17333939484785264282
20 727718718839603466267