# A149713 (b-file synthesized from sequence entry)
0 1
1 1
2 5
3 17
4 71
5 289
6 1269
7 5529
8 24779
9 111551
10 509963
11 2340953
12 10839905
13 50411789
14 235844465
15 1107194945
16 5219661875
17 24680610811
18 117075851463
19 556728580407
20 2654084789355
21 12679171087595
22 60696272736839
23 291070028708913
24 1398220437952441
25 6726843557751409
26 32409881516115509
27 156354857436362549