# A004794 (b-file synthesized from sequence entry)
1 3
2 7
3 7
4 28
5 45
6 189
7 799
8 2091
9 2091
10 8856
11 14329
12 60697
13 257115
14 673135
15 673135
16 2851444
17 4613733
18 19544085
19 82790071
20 216747219
21 216747219
22 918155952
23 1485607537
24 6293134513
25 26658145587
26 69791931223
27 69791931223
28 295643364940