# A037093 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 14
4 57
5 229
6 916
7 7761
8 29567
9 117474
10 469113
11 3973641
12 15138352
13 60146777
14 240187355
15 2070207870
16 7733090689
17 30791909229
18 260408711716
19 991495872825
20 3942106110215
21 15739612088946
22 133333733918417