# A018080 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 7
4 12
5 23
6 42
7 78
8 144
9 269
10 499
11 929
12 1728
13 3217
14 5986
15 11142
16 20736
17 38595
18 71832
19 133694
20 248832
21 463129
22 861980
23 1604325
24 2985984
25 5557543
26 10343752
27 19251892
28 35831808
29 66690510
30 124125024