# A170881 (b-file synthesized from sequence entry)
0 0
1 1
2 3
3 8
4 21
5 53
6 129
7 305
8 705
9 1601
10 3585
11 7937
12 17409
13 37889
14 81921
15 176129
16 376833
17 802817
18 1703937
19 3604481
20 7602177
21 15990785
22 33554433
23 70254593
24 146800641
25 306184193
26 637534209
27 1325400065
28 2751463425
29 5704253441
30 11811160065
31 24427626497
32 50465865729