# A149072 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 11
4 43
5 179
6 781
7 3471
8 15741
9 72367
10 336461
11 1577173
12 7446583
13 35355517
14 168668857
15 807863711
16 3882620245
17 18714490787
18 90434837781
19 437982274021
20 2125332358191
21 10331177307429
22 50297266238485
23 245211647137771
24 1196962916588179
25 5849407909527251
26 28614772630350577
27 140112559515502989