# A018170 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 6
4 11
5 19
6 35
7 62
8 112
9 201
10 361
11 651
12 1173
13 2113
14 3807
15 6859
16 12360
17 22273
18 40135
19 72321
20 130321
21 234837
22 423171
23 762547
24 1374097
25 2476099
26 4461889
27 8040249
28 14488392
29 26107837
30 47045881
31 84775884