A164522 - cp's OEIS frontend

A164522 Numbers k such that sigma_odd(k) = sigma_odd(k+1), where sigma_odd(k) is the sum of the odd divisors of k (A000593).

n	a(n)
1	1
2	27089
3	115289
4	233729
5	2529090
6	2880989
7	14059709
8	17192909
9	17540250
10	18693990
11	34902630
12	54722249
13	58517910
14	82200689
15	83087730
16	92991990
17	93623250
18	93862230
19	96578369
20	111681990
21	112244369
22	155120129
23	206450369
24	269626769
25	293182469
26	303206310
27	324764910

[1, 27089, 115289, 233729, 2529090, 2880989, 14059709, 17192909, 17540250, 18693990, 34902630, 54722249, 58517910, 82200689, 83087730, 92991990, 93623250, 93862230, 96578369, 111681990, 112244369, 155120129, 206450369, 269626769, 293182469, 303206310, 324764910]

cp's OEIS Frontend

A164522 Numbers k such that sigma_odd(k) = sigma_odd(k+1), where sigma_odd(k) is the sum of the odd divisors of k (A000593).

Table of values

List of values