A067766 - cp's OEIS frontend

A067766 Numbers k such that sigma(k)^2 > 4*sigma_2(k) where sigma_2(k) is the sum of squares over the divisors of k.

n	a(n)
1	24
2	36
3	48
4	60
5	72
6	84
7	90
8	96
9	108
10	120
11	126
12	132
13	140
14	144
15	150
16	156
17	160
18	168
19	180
20	192
21	204
22	210
23	216
24	228
25	240
26	252
27	264
28	270
29	276
30	280
31	288
32	300
33	312
34	320
35	324
36	330
37	336
38	360
39	378
40	384
41	390
42	396
43	400
44	408
45	420
46	432
47	440
48	450
49	456
50	462
51	468
52	480
53	504

[24, 36, 48, 60, 72, 84, 90, 96, 108, 120, 126, 132, 140, 144, 150, 156, 160, 168, 180, 192, 204, 210, 216, 228, 240, 252, 264, 270, 276, 280, 288, 300, 312, 320, 324, 330, 336, 360, 378, 384, 390, 396, 400, 408, 420, 432, 440, 450, 456, 462, 468, 480, 504]

cp's OEIS Frontend

A067766 Numbers k such that sigma(k)^2 > 4*sigma_2(k) where sigma_2(k) is the sum of squares over the divisors of k.

Table of values

List of values

n	a(n)
1	24
2	36
3	48
4	60
5	72
6	84
7	90
8	96
9	108
10	120
11	126
12	132
13	140
14	144
15	150
16	156
17	160
18	168
19	180
20	192
21	204
22	210
23	216
24	228
25	240
26	252
27	264
28	270
29	276
30	280
31	288
32	300
33	312
34	320
35	324
36	330
37	336
38	360
39	378
40	384
41	390
42	396
43	400
44	408
45	420
46	432
47	440
48	450
49	456
50	462
51	468
52	480
53	504

n	a(n)
1	24
2	36
3	48
4	60
5	72
6	84
7	90
8	96
9	108
10	120
11	126
12	132
13	140
14	144
15	150
16	156
17	160
18	168
19	180
20	192
21	204
22	210
23	216
24	228
25	240
26	252
27	264
28	270
29	276
30	280
31	288
32	300
33	312
34	320
35	324
36	330
37	336
38	360
39	378
40	384
41	390
42	396
43	400
44	408
45	420
46	432
47	440
48	450
49	456
50	462
51	468
52	480
53	504

n	a(n)
1	24
2	36
3	48
4	60
5	72
6	84
7	90
8	96
9	108
10	120
11	126
12	132
13	140
14	144
15	150
16	156
17	160
18	168
19	180
20	192
21	204
22	210
23	216
24	228
25	240
26	252
27	264
28	270
29	276
30	280
31	288
32	300
33	312
34	320
35	324
36	330
37	336
38	360
39	378
40	384
41	390
42	396
43	400
44	408
45	420
46	432
47	440
48	450
49	456
50	462
51	468
52	480
53	504