# A018102 (b-file synthesized from sequence entry)
0 1
1 2
2 4
3 9
4 20
5 42
6 89
7 189
8 400
9 845
10 1788
11 3782
12 8000
13 16917
14 35777
15 75659
16 160000
17 338358
18 715541
19 1513186
20 3200000
21 6767176
22 14310835
23 30263731
24 64000000
25 135343521
26 286216701
27 605274629
28 1280000000
29 2706870434
30 5724334022
31 12105492595
32 25600000000