# A149968 (b-file synthesized from sequence entry)
0 1
1 2
2 5
3 16
4 55
5 188
6 674
7 2471
8 9067
9 33926
10 128156
11 484224
12 1847218
13 7084777
14 27186054
15 104885416
16 405958461
17 1572023508
18 6108058902
19 23783305717
20 92648913045
21 361724652715
22 1414358846767
23 5532545855330
24 21675406458263
25 85011660185348
26 333545750611017
27 1310157468147696
28 5150459680441075