A079403 - cp's OEIS frontend

A079403 Let G(t) be the set of numbers between 2^(t-1) and 2^t-1, inclusive. There is a unique number a(t) in G(t) so that the denominator of the a(t)-th partial sum of the double harmonic series is divisible by smaller 2-powers than its neighbors.

n	a(n)
2	3
3	6
4	13
5	27
6	54
7	109
8	219
9	439
10	879
11	1759
12	3518
13	7037
14	14075
15	28151
16	56303
17	112606
18	225212
19	450424
20	900848
21	1801696
22	3603393
23	7206787
24	14413574
25	28827148
26	57654296
27	115308593
28	230617186
29	461234373

[3, 6, 13, 27, 54, 109, 219, 439, 879, 1759, 3518, 7037, 14075, 28151, 56303, 112606, 225212, 450424, 900848, 1801696, 3603393, 7206787, 14413574, 28827148, 57654296, 115308593, 230617186, 461234373]

cp's OEIS Frontend

A079403 Let G(t) be the set of numbers between 2^(t-1) and 2^t-1, inclusive. There is a unique number a(t) in G(t) so that the denominator of the a(t)-th partial sum of the double harmonic series is divisible by smaller 2-powers than its neighbors.

Table of values

List of values