# A083315 (b-file synthesized from sequence entry)
0 1
1 4
2 19
3 97
4 505
5 2629
6 13609
7 69997
8 357985
9 1822309
10 9241849
11 46731997
12 235754065
13 1187152789
14 5969306089
15 29980723597
16 150440439745
17 754349584069
18 3780337658329
19 18936047636797
20 94817676351025
21 474638135996149