# A149172 (b-file synthesized from sequence entry)
0 1
1 1
2 4
3 10
4 33
5 117
6 389
7 1471
8 5400
9 20343
10 79235
11 305897
12 1209618
13 4815788
14 19257434
15 77913848
16 316467071
17 1292277438
18 5311275382
19 21899703829
20 90691380350
21 377154613794
22 1572516268371
23 6579906312561
24 27608923900448
25 116114796021967
26 489683028608476
27 2069286621698950
28 8762544387852487