A335067 - cp's OEIS frontend

A335067 Numbers k where records occur for sigma(k+1)/sigma(k), where sigma(k) is the sum of divisors of k (A000203).

n	a(n)
1	1
2	179
3	239
4	359
5	719
6	839
7	1259
8	3359
9	5039
10	10079
11	25199
12	27719
13	50399
14	55439
15	110879
16	166319
17	360359
18	665279
19	831599
20	1081079
21	1441439
22	2162159
23	3603599
24	4324319
25	12972959
26	21621599
27	43243199
28	61261199
29	73513439
30	122522399
31	205405199
32	245044799
33	410810399

[1, 179, 239, 359, 719, 839, 1259, 3359, 5039, 10079, 25199, 27719, 50399, 55439, 110879, 166319, 360359, 665279, 831599, 1081079, 1441439, 2162159, 3603599, 4324319, 12972959, 21621599, 43243199, 61261199, 73513439, 122522399, 205405199, 245044799, 410810399]

cp's OEIS Frontend

A335067 Numbers k where records occur for sigma(k+1)/sigma(k), where sigma(k) is the sum of divisors of k (A000203).

Table of values

List of values