# A027124 (b-file synthesized from sequence entry)
3 1
4 2
5 7
6 24
7 81
8 270
9 886
10 2861
11 9109
12 28652
13 89211
14 275420
15 844320
16 2573161
17 7803656
18 23569375
19 70941900
20 212911167
21 637427166
22 1904416809
23 5679745126
24 16913962409
25 50304623519
26 149450737592
27 443593524167
28 1315613998440