# A019128 (b-file synthesized from sequence entry)
3 0
4 1
5 4
6 1
7 10
8 28
9 48
10 81
11 254
12 633
13 1294
14 3294
15 8814
16 20833
17 52532
18 138633
19 352768
20 906313
21 2379672
22 6221455
23 16285472
24 42966251
25 113590300
26 300405217
27 796788406
28 2117933593
29 5634362070
30 15011420863