# A148595 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 20
5 57
6 196
7 668
8 2393
9 8767
10 32685
11 123971
12 475817
13 1847493
14 7237415
15 28604348
16 113831462
17 456068443
18 1837914610
19 7444900802
20 30305229024
21 123883817163
22 508434835137
23 2094251103092
24 8654631662005
25 35875740152914
26 149133744596402
27 621558342327013
28 2596840502079358