# A074356 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 0
4 12
5 42
6 180
7 561
8 1833
9 5373
10 15798
11 44367
12 123561
13 336243
14 906054
15 2408094
16 6344832
17 16561824
18 42922602
19 110472933
20 282678423
21 719404803
22 1822117962
23 4594816221
24 11540742615
25 28880919975
26 72033463644
27 179107709004