# A149285 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 44
5 158
6 658
7 2607
8 11193
9 46595
10 204255
11 875999
12 3896188
13 17047797
14 76627162
15 340148317
16 1541155940
17 6915715632
18 31530564726
19 142683439604
20 653825245219
21 2978569580564
22 13705939356429
23 62778713274257
24 289894469530054
25 1333800098361492
26 6177646452734974
27 28530308252975460