# A005907 (b-file synthesized from sequence entry)
0 1
1 3
2 4
3 8
4 14
5 26
6 48
7 90
8 167
9 312
10 582
11 1086
12 2027
13 3784
14 7063
15 13185
16 24613
17 45946
18 85770
19 160112
20 298890
21 557956
22 1041570
23 1944361
24 3629656
25 6775698
26 12648604
27 23611913
28 44077784
29 82282661
30 153602013