A064934 - OEIS

A064934 as a simple table

n	a(n)
0	1
1	2
2	5
3	11
4	23
5	43
6	89
7	179
8	359
9	719
10	1433
11	2879
12	5749
13	11497
14	22993
15	45989
16	91997
17	183971
18	367949
19	735901
20	1471807
21	2943599
22	5887213
23	11774429
24	23548853
25	47097697
26	94195421
27	188390809
28	376781623
29	753563269
30	1507126519
31	3014253049

[1,2,5,11,23,43,89,179,359,719,1433,2879,5749, 11497,22993,45989,91997,183971,367949,735901, 1471807,2943599,5887213,11774429,23548853, 47097697,94195421,188390809,376781623,753563269, 1507126519,3014253049]