A372566 - cp's OEIS frontend

A372566 Numbers k such that k, sigma(k) and A003961(k) have a common divisor larger than 1, where A003961(n) is fully multiplicative function with a(prime(i)) = prime(i+1).

n	a(n)
1	6
2	18
3	24
4	30
5	42
6	54
7	60
8	66
9	72
10	78
11	90
12	96
13	102
14	114
15	120
16	126
17	132
18	135
19	138
20	140
21	150
22	162
23	168
24	174
25	180
26	186
27	198
28	204
29	210
30	216
31	222
32	234
33	240
34	246
35	258
36	264
37	270
38	276
39	282
40	285
41	288
42	294
43	306
44	312
45	318
46	330
47	342
48	348
49	354
50	360
51	366
52	378
53	384
54	390
55	396
56	402
57	408
58	414
59	420
60	426
61	435
62	438
63	450
64	455
65	456
66	462

[6, 18, 24, 30, 42, 54, 60, 66, 72, 78, 90, 96, 102, 114, 120, 126, 132, 135, 138, 140, 150, 162, 168, 174, 180, 186, 198, 204, 210, 216, 222, 234, 240, 246, 258, 264, 270, 276, 282, 285, 288, 294, 306, 312, 318, 330, 342, 348, 354, 360, 366, 378, 384, 390, 396, 402, 408, 414, 420, 426, 435, 438, 450, 455, 456, 462]

cp's OEIS Frontend

A372566 Numbers k such that k, sigma(k) and A003961(k) have a common divisor larger than 1, where A003961(n) is fully multiplicative function with a(prime(i)) = prime(i+1).

Table of values

List of values

n	a(n)
1	6
2	18
3	24
4	30
5	42
6	54
7	60
8	66
9	72
10	78
11	90
12	96
13	102
14	114
15	120
16	126
17	132
18	135
19	138
20	140
21	150
22	162
23	168
24	174
25	180
26	186
27	198
28	204
29	210
30	216
31	222
32	234
33	240
34	246
35	258
36	264
37	270
38	276
39	282
40	285
41	288
42	294
43	306
44	312
45	318
46	330
47	342
48	348
49	354
50	360
51	366
52	378
53	384
54	390
55	396
56	402
57	408
58	414
59	420
60	426
61	435
62	438
63	450
64	455
65	456
66	462

n	a(n)
1	6
2	18
3	24
4	30
5	42
6	54
7	60
8	66
9	72
10	78
11	90
12	96
13	102
14	114
15	120
16	126
17	132
18	135
19	138
20	140
21	150
22	162
23	168
24	174
25	180
26	186
27	198
28	204
29	210
30	216
31	222
32	234
33	240
34	246
35	258
36	264
37	270
38	276
39	282
40	285
41	288
42	294
43	306
44	312
45	318
46	330
47	342
48	348
49	354
50	360
51	366
52	378
53	384
54	390
55	396
56	402
57	408
58	414
59	420
60	426
61	435
62	438
63	450
64	455
65	456
66	462

n	a(n)
1	6
2	18
3	24
4	30
5	42
6	54
7	60
8	66
9	72
10	78
11	90
12	96
13	102
14	114
15	120
16	126
17	132
18	135
19	138
20	140
21	150
22	162
23	168
24	174
25	180
26	186
27	198
28	204
29	210
30	216
31	222
32	234
33	240
34	246
35	258
36	264
37	270
38	276
39	282
40	285
41	288
42	294
43	306
44	312
45	318
46	330
47	342
48	348
49	354
50	360
51	366
52	378
53	384
54	390
55	396
56	402
57	408
58	414
59	420
60	426
61	435
62	438
63	450
64	455
65	456
66	462