# A149487 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 13
4 60
5 241
6 1152
7 5047
8 24522
9 112283
10 550476
11 2585230
12 12743808
13 60807446
14 300821244
15 1450713881
16 7194489294
17 34955715150
18 173659372472
19 848372256917
20 4220145869377
21 20701409816068
22 103077576284629
23 507239684062705
24 2527570853604017
25 12469126050075458
26 62170048090065723
27 307313319397142302