# A148864 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 28
5 96
6 360
7 1384
8 5513
9 22356
10 92884
11 391014
12 1669886
13 7215742
14 31490654
15 138607154
16 615048548
17 2747302204
18 12346906738
19 55802001785
20 253432831954
21 1156167541210
22 5296570959500
23 24354455083955
24 112371278895130
25 520151980622491
26 2414733832563686
27 11240552129122354
28 52458510164088043