A344703 - cp's OEIS frontend

A344703 Numbers k for which sigma(k^2) and psi(k^2) share a factor, where sigma is the sum of divisors, A000203, and psi is the Dedekind psi function, A001615.

n	a(n)
1	14
2	21
3	26
4	28
5	35
6	38
7	39
8	42
9	52
10	56
11	57
12	62
13	63
14	65
15	70
16	74
17	76
18	77
19	78
20	82
21	84
22	86
23	93
24	95
25	98
26	99
27	104
28	105
29	111
30	112
31	114
32	117
33	119
34	122
35	124
36	126
37	129
38	130
39	133
40	134
41	140
42	143
43	146
44	148
45	152
46	154
47	155
48	156
49	158
50	161
51	166
52	168
53	171
54	172
55	175
56	182
57	183
58	185
59	186
60	189
61	190
62	194
63	195
64	198
65	201
66	203
67	206
68	208
69	209

[14, 21, 26, 28, 35, 38, 39, 42, 52, 56, 57, 62, 63, 65, 70, 74, 76, 77, 78, 82, 84, 86, 93, 95, 98, 99, 104, 105, 111, 112, 114, 117, 119, 122, 124, 126, 129, 130, 133, 134, 140, 143, 146, 148, 152, 154, 155, 156, 158, 161, 166, 168, 171, 172, 175, 182, 183, 185, 186, 189, 190, 194, 195, 198, 201, 203, 206, 208, 209]

cp's OEIS Frontend

A344703 Numbers k for which sigma(k^2) and psi(k^2) share a factor, where sigma is the sum of divisors, A000203, and psi is the Dedekind psi function, A001615.

Table of values

List of values

n	a(n)
1	14
2	21
3	26
4	28
5	35
6	38
7	39
8	42
9	52
10	56
11	57
12	62
13	63
14	65
15	70
16	74
17	76
18	77
19	78
20	82
21	84
22	86
23	93
24	95
25	98
26	99
27	104
28	105
29	111
30	112
31	114
32	117
33	119
34	122
35	124
36	126
37	129
38	130
39	133
40	134
41	140
42	143
43	146
44	148
45	152
46	154
47	155
48	156
49	158
50	161
51	166
52	168
53	171
54	172
55	175
56	182
57	183
58	185
59	186
60	189
61	190
62	194
63	195
64	198
65	201
66	203
67	206
68	208
69	209

n	a(n)
1	14
2	21
3	26
4	28
5	35
6	38
7	39
8	42
9	52
10	56
11	57
12	62
13	63
14	65
15	70
16	74
17	76
18	77
19	78
20	82
21	84
22	86
23	93
24	95
25	98
26	99
27	104
28	105
29	111
30	112
31	114
32	117
33	119
34	122
35	124
36	126
37	129
38	130
39	133
40	134
41	140
42	143
43	146
44	148
45	152
46	154
47	155
48	156
49	158
50	161
51	166
52	168
53	171
54	172
55	175
56	182
57	183
58	185
59	186
60	189
61	190
62	194
63	195
64	198
65	201
66	203
67	206
68	208
69	209

n	a(n)
1	14
2	21
3	26
4	28
5	35
6	38
7	39
8	42
9	52
10	56
11	57
12	62
13	63
14	65
15	70
16	74
17	76
18	77
19	78
20	82
21	84
22	86
23	93
24	95
25	98
26	99
27	104
28	105
29	111
30	112
31	114
32	117
33	119
34	122
35	124
36	126
37	129
38	130
39	133
40	134
41	140
42	143
43	146
44	148
45	152
46	154
47	155
48	156
49	158
50	161
51	166
52	168
53	171
54	172
55	175
56	182
57	183
58	185
59	186
60	189
61	190
62	194
63	195
64	198
65	201
66	203
67	206
68	208
69	209