# A149271 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 11
4 42
5 131
6 561
7 1897
8 8264
9 30205
10 133945
11 505237
12 2280622
13 8858735
14 40332662
15 160335565
16 735744074
17 2972238961
18 13729284799
19 56239449957
20 261023413798
21 1081746128971
22 5041413026620
23 21089879774557
24 98638353015282
25 416028438965419
26 1951434704818877
27 8289421176613483