# A149140 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 9
4 36
5 110
6 440
7 1485
8 6138
9 21902
10 92050
11 339946
12 1446888
13 5494374
14 23538850
15 91150203
16 392888970
17 1545871468
18 6689452848
19 26641201900
20 115706733198
21 465593151464
22 2027309413796
23 8225800678704
24 35902335117164
25 146733053157966
26 641572595904506
27 2638046749674882
28 11553667215934304