# A018169 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 6
4 11
5 19
6 34
7 62
8 111
9 200
10 361
11 651
12 1172
13 2112
14 3806
15 6859
16 12360
17 22272
18 40134
19 72321
20 130321
21 234836
22 423171
23 762547
24 1374097
25 2476099
26 4461889
27 8040248
28 14488391
29 26107837
30 47045881
31 84775884