# A149378 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 12
4 48
5 172
6 704
7 2832
8 12048
9 51167
10 222291
11 972073
12 4314357
13 19287153
14 86967804
15 394239816
16 1798586922
17 8247848422
18 38011507458
19 175879906285
20 816790596799
21 3806042455632
22 17792597421918
23 83419217824454
24 392122329044956
25 1847566010330373
26 8724681867410249
27 41287279746464866