# A149238 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 36
5 125
6 435
7 1595
8 5954
9 22465
10 86223
11 334795
12 1315848
13 5206019
14 20773532
15 83318857
16 336730400
17 1367649633
18 5578371219
19 22851417683
20 93958046678
21 387906668755
22 1606184507258
23 6669799558525
24 27769835689296
25 115931233180053
26 485172793681327
27 2034581806716141
28 8549095477414610