# A217069 (b-file synthesized from sequence entry)
0 0
1 2
2 7
3 69
4 377
5 2794
6 17499
7 119930
8 782560
9 5243499
10 34631867
11 230522137
12 1527974718
13 10151087309
14 67355177296
15 447219602022
16 2968334148479
17 19705628071261
18 130804123379301
19 868315777996646
20 5763951923164423
21 38262238564792074
22 253989877628319020