# A018078 (b-file synthesized from sequence entry)
0 1
1 1
2 3
3 6
4 12
5 22
6 41
7 77
8 144
9 268
10 498
11 928
12 1728
13 3216
14 5985
15 11141
16 20736
17 38594
18 71831
19 133693
20 248832
21 463128
22 861979
23 1604324
24 2985984
25 5557542
26 10343751
27 19251891
28 35831808
29 66690509
30 124125023