# A018179 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 7
4 12
5 22
6 41
7 76
8 141
9 261
10 484
11 899
12 1667
13 3093
14 5739
15 10648
16 19759
17 36664
18 68034
19 126243
20 234256
21 434686
22 806603
23 1496733
24 2777339
25 5153632
26 9563084
27 17745265
28 32928126
29 61101455
30 113379904