A349168 - cp's OEIS frontend

A349168 Numbers k such that sigma(k) and A003961(k) share a prime power divisor that is not a unitary divisor of A003961(k). Here A003961(n) is fully multiplicative function with a(prime(k)) = prime(k+1).

n	a(n)
1	8
2	20
3	24
4	27
5	32
6	40
7	44
8	54
9	56
10	60
11	72
12	80
13	88
14	92
15	96
16	100
17	104
18	108
19	116
20	120
21	128
22	132
23	135
24	140
25	152
26	160
27	164
28	168
29	171
30	176
31	180
32	184
33	188
34	189
35	196
36	200
37	216
38	224
39	232
40	236
41	240
42	248
43	260
44	261
45	264
46	270
47	272
48	276
49	280
50	288
51	296
52	297
53	300
54	308
55	312
56	320
57	325
58	328
59	332
60	342
61	344
62	348
63	351
64	352
65	360
66	368
67	376

[8, 20, 24, 27, 32, 40, 44, 54, 56, 60, 72, 80, 88, 92, 96, 100, 104, 108, 116, 120, 128, 132, 135, 140, 152, 160, 164, 168, 171, 176, 180, 184, 188, 189, 196, 200, 216, 224, 232, 236, 240, 248, 260, 261, 264, 270, 272, 276, 280, 288, 296, 297, 300, 308, 312, 320, 325, 328, 332, 342, 344, 348, 351, 352, 360, 368, 376]

cp's OEIS Frontend

A349168 Numbers k such that sigma(k) and A003961(k) share a prime power divisor that is not a unitary divisor of A003961(k). Here A003961(n) is fully multiplicative function with a(prime(k)) = prime(k+1).

Table of values

List of values

n	a(n)
1	8
2	20
3	24
4	27
5	32
6	40
7	44
8	54
9	56
10	60
11	72
12	80
13	88
14	92
15	96
16	100
17	104
18	108
19	116
20	120
21	128
22	132
23	135
24	140
25	152
26	160
27	164
28	168
29	171
30	176
31	180
32	184
33	188
34	189
35	196
36	200
37	216
38	224
39	232
40	236
41	240
42	248
43	260
44	261
45	264
46	270
47	272
48	276
49	280
50	288
51	296
52	297
53	300
54	308
55	312
56	320
57	325
58	328
59	332
60	342
61	344
62	348
63	351
64	352
65	360
66	368
67	376

n	a(n)
1	8
2	20
3	24
4	27
5	32
6	40
7	44
8	54
9	56
10	60
11	72
12	80
13	88
14	92
15	96
16	100
17	104
18	108
19	116
20	120
21	128
22	132
23	135
24	140
25	152
26	160
27	164
28	168
29	171
30	176
31	180
32	184
33	188
34	189
35	196
36	200
37	216
38	224
39	232
40	236
41	240
42	248
43	260
44	261
45	264
46	270
47	272
48	276
49	280
50	288
51	296
52	297
53	300
54	308
55	312
56	320
57	325
58	328
59	332
60	342
61	344
62	348
63	351
64	352
65	360
66	368
67	376

n	a(n)
1	8
2	20
3	24
4	27
5	32
6	40
7	44
8	54
9	56
10	60
11	72
12	80
13	88
14	92
15	96
16	100
17	104
18	108
19	116
20	120
21	128
22	132
23	135
24	140
25	152
26	160
27	164
28	168
29	171
30	176
31	180
32	184
33	188
34	189
35	196
36	200
37	216
38	224
39	232
40	236
41	240
42	248
43	260
44	261
45	264
46	270
47	272
48	276
49	280
50	288
51	296
52	297
53	300
54	308
55	312
56	320
57	325
58	328
59	332
60	342
61	344
62	348
63	351
64	352
65	360
66	368
67	376