# A011955 (b-file synthesized from sequence entry)
2 1
3 2
4 4
5 9
6 19
7 40
8 80
9 165
10 330
11 672
12 1344
13 2709
14 5418
15 10878
16 21760
17 43605
18 87211
19 174592
20 349180
21 698707
22 1397418
23 2795520
24 5591040
25 11183436
26 22366890
27 44736512
28 89473020
29 178951509
30 357903000
31 715816960
32 1431633920
33 2863289683
34 5726579370
35 11453202383
36 22906404864
37 45812897109
38 91625794218