# A148810 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 26
5 86
6 305
7 1104
8 4127
9 15865
10 61291
11 242393
12 972891
13 3914605
14 15992813
15 66039145
16 272797057
17 1139731760
18 4799616692
19 20201380611
20 85786198770
21 366534573684
22 1564618416246
23 6727065028303
24 29066076665305
25 125444611684962
26 544649409416965
27 2374412332299237
28 10338463313918359