# A148774 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 8
4 22
5 80
6 265
7 888
8 3336
9 12249
10 45072
11 173673
12 672941
13 2595981
14 10244208
15 41012730
16 162936518
17 655570981
18 2678127981
19 10874155875
20 44444744731
21 183974555899
22 759720059015
23 3144923360494
24 13144320477323
25 54991936410992
26 230045973211635
27 969001518828255
28 4094574894059769