# A019095 (b-file synthesized from sequence entry)
3 0
4 1
5 2
6 6
7 10
8 30
9 42
10 126
11 308
12 688
13 1436
14 3536
15 7261
16 18323
17 42046
18 104611
19 256824
20 658364
21 1658724
22 4386555
23 11337498
24 30272771
25 79610468
26 212690656
27 562612764
28 1499043449
29 3965697029
30 10529372555