# A149396 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 50
5 187
6 801
7 3367
8 14750
9 64496
10 288283
11 1298078
12 5916459
13 27107847
14 125107445
15 580279403
16 2704828242
17 12656086712
18 59445058605
19 280159509962
20 1324504668796
21 6278619362700
22 29835818846267
23 142094119428556
24 678102617877031
25 3242027299595844
26 15526944664613450
27 74482919169897600