# A149239 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 36
5 125
6 451
7 1611
8 6098
9 23153
10 88821
11 346225
12 1365886
13 5401489
14 21606970
15 86968247
16 351607286
17 1428888059
18 5840997903
19 23943014939
20 98559682258
21 407172518273
22 1687183992996
23 7009130833603
24 29208987996046
25 121986919568951
26 510636734720537
27 2142104892732337
28 9004523704570678