# A013326 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 7
4 14
5 31
6 68
7 146
8 313
9 674
10 1453
11 3130
12 6740
13 14515
14 31262
15 67331
16 145012
17 312314
18 672637
19 1448674
20 3120041
21 6719698
22 14472356
23 31169423
24 67130254
25 144579863
26 311384740
27 670635970
28 1444363025