# A018096 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 8
4 18
5 37
6 76
7 157
8 324
9 667
10 1374
11 2831
12 5832
13 12012
14 24743
15 50964
16 104976
17 216226
18 445375
19 917369
20 1889568
21 3892070
22 8016758
23 16512654
24 34012224
25 70057261
26 144301645
27 297227788
28 612220032