# A292764 (b-file synthesized from sequence entry)
1 2
2 8
3 18
4 36
5 66
6 120
7 210
8 360
9 618
10 1052
11 1790
12 3040
13 5162
14 8756
15 14854
16 25192
17 42722
18 72444
19 122846
20 208304
21 353210