# A255632 (b-file synthesized from sequence entry)
0 1
1 4
2 17
3 73
4 312
5 1333
6 5697
7 24348
8 104057
9 444713
10 1900592
11 8122653
12 34714177
13 148359668
14 634051937
15 2709778633
16 11580912872
17 49493911173
18 211524537857
19 904002715788
20 3863480419017
21 16511544365353
22 70566191040352