# A148809 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 26
5 86
6 300
7 1099
8 4065
9 15464
10 60126
11 235711
12 938916
13 3786566
14 15373560
15 63058702
16 260700178
17 1083632350
18 4536791630
19 19096536008
20 80737061523
21 343192967447
22 1464457668985
23 6271953873038
24 26975682913289
25 116353776657458
26 503418109852904
27 2185615416588541
28 9509539891579458