# A149483 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 58
5 231
6 1083
7 4719
8 22652
9 103146
10 501823
11 2346298
12 11508135
13 54722503
14 269804391
15 1297724477
16 6420746958
17 31134239547
18 154419290003
19 753235565962
20 3742452711191
21 18336829105522
22 91224524169927
23 448509319572824
24 2233479072961931
25 11010623240374934
26 54871480488519669
27 271087435138530413