# A278613 (b-file synthesized from sequence entry)
0 3
1 8
2 21
3 55
4 145
5 381
6 1001
7 2633
8 6921
9 18193
10 47833
11 125745
12 330569
13 869057
14 2284665
15 6006193
16 15789865
17 41510241
18 109127129
19 286886801