A309729 - cp's OEIS frontend

A309729 Expansion of Sum_{k>=1} x^k/(1 - x^k - 2x^(2k)).

n	a(n)
1	1
2	2
3	4
4	7
5	12
6	26
7	44
8	92
9	175
10	354
11	684
12	1396
13	2732
14	5506
15	10938
16	21937
17	43692
18	87578
19	174764
20	349884
21	699098
22	1398786
23	2796204
24	5593886
25	11184823
26	22372354
27	44739418
28	89483996
29	178956972
30	357925242
31	715827884
32	1431677702
33	2863312218
34	5726666754
35	11453246178
36	22906581193

[1, 2, 4, 7, 12, 26, 44, 92, 175, 354, 684, 1396, 2732, 5506, 10938, 21937, 43692, 87578, 174764, 349884, 699098, 1398786, 2796204, 5593886, 11184823, 22372354, 44739418, 89483996, 178956972, 357925242, 715827884, 1431677702, 2863312218, 5726666754, 11453246178, 22906581193]

cp's OEIS Frontend

A309729 Expansion of Sum_{k>=1} x^k/(1 - x^k - 2x^(2k)).

Table of values

List of values

cp's OEIS Frontend

A309729 Expansion of Sum_{k>=1} x^k/(1 - x^k - 2*x^(2*k)).

Table of values

List of values

A309729 Expansion of Sum_{k>=1} x^k/(1 - x^k - 2x^(2k)).