# A037490 (b-file synthesized from sequence entry)
1 2
2 11
3 57
4 286
5 1432
6 7161
7 35807
8 179036
9 895182
10 4475911
11 22379557
12 111897786
13 559488932
14 2797444661
15 13987223307
16 69936116536
17 349680582682
18 1748402913411
19 8742014567057
20 43710072835286
21 218550364176432
22 1092751820882161