# A121569 (b-file synthesized from sequence entry)
2 1
3 2
4 4
5 12
6 20
7 54
8 88
9 232
10 986
11 1596
12 6764
13 17710
14 28656
15 75024
16 317810
17 1346268
18 2178308
19 9227464
20 24157816
21 39088168
22 165580140
23 433494436
24 1836311902
25 12586269024
26 32951280098
27 53316291172
28 139583862444
29 225851433716