# A002222 (b-file synthesized from sequence entry)
1 1
2 6
3 21
4 91
5 266
6 994
7 2562
8 7764
9 19482
10 51212
11 116028
12 288541
13 612463
14 1375609
15 2862437
16 6036606
17 11846488
18 24080685
19 45506290