# A035617 (b-file synthesized from sequence entry)
0 1
1 0
2 3
3 3
4 15
5 33
6 105
7 297
8 879
9 2631
10 7833
11 23697
12 71385
13 216765
14 657849
15 2003151
16 6103743
17 18624693
18 56870385
19 173760513
20 531128349
21 1623881889
22 4965695331
23 15185222199
24 46435889601
25 141985777503