A340816 - cp's OEIS frontend

A340816 Numbers k for which sigma(k^2)/k^2 reaches a new record, where sigma = A000203.

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	24
7	30
8	60
9	120
10	180
11	210
12	360
13	420
14	840
15	1260
16	2520
17	4620
18	9240
19	13860
20	27720
21	55440
22	60060
23	120120
24	180180
25	360360
26	720720
27	1441440
28	1801800
29	2042040
30	3063060
31	6126120
32	12252240
33	24504480
34	30630600
35	36756720
36	38798760
37	58198140
38	116396280

[1, 2, 4, 6, 12, 24, 30, 60, 120, 180, 210, 360, 420, 840, 1260, 2520, 4620, 9240, 13860, 27720, 55440, 60060, 120120, 180180, 360360, 720720, 1441440, 1801800, 2042040, 3063060, 6126120, 12252240, 24504480, 30630600, 36756720, 38798760, 58198140, 116396280]

cp's OEIS Frontend

A340816 Numbers k for which sigma(k^2)/k^2 reaches a new record, where sigma = A000203.

Table of values

List of values