# A037585 (b-file synthesized from sequence entry)
1 3
2 19
3 117
4 703
5 4221
6 25327
7 151965
8 911791
9 5470749
10 32824495
11 196946973
12 1181681839
13 7090091037
14 42540546223
15 255243277341
16 1531459664047
17 9188757984285
18 55132547905711
19 330795287434269
20 1984771724605615