A069825 - cp's OEIS frontend

A069825 Numbers k such that there is no x < k such that sigma(x) = phi(k).

n	a(n)
1	1
2	3
3	4
4	6
5	11
6	17
7	22
8	23
9	32
10	34
11	40
12	46
13	47
14	48
15	53
16	59
17	60
18	67
19	71
20	83
21	85
22	89
23	94
24	101
25	106
26	107
27	115
28	118
29	125
30	128
31	131
32	134
33	136
34	137
35	141
36	142
37	149
38	160
39	166
40	167
41	170
42	173
43	177
44	178
45	179
46	184
47	188
48	191
49	192
50	197
51	202
52	204
53	214
54	227
55	230
56	233
57	235
58	236

[1, 3, 4, 6, 11, 17, 22, 23, 32, 34, 40, 46, 47, 48, 53, 59, 60, 67, 71, 83, 85, 89, 94, 101, 106, 107, 115, 118, 125, 128, 131, 134, 136, 137, 141, 142, 149, 160, 166, 167, 170, 173, 177, 178, 179, 184, 188, 191, 192, 197, 202, 204, 214, 227, 230, 233, 235, 236]

cp's OEIS Frontend

A069825 Numbers k such that there is no x < k such that sigma(x) = phi(k).

Table of values

List of values

n	a(n)
1	1
2	3
3	4
4	6
5	11
6	17
7	22
8	23
9	32
10	34
11	40
12	46
13	47
14	48
15	53
16	59
17	60
18	67
19	71
20	83
21	85
22	89
23	94
24	101
25	106
26	107
27	115
28	118
29	125
30	128
31	131
32	134
33	136
34	137
35	141
36	142
37	149
38	160
39	166
40	167
41	170
42	173
43	177
44	178
45	179
46	184
47	188
48	191
49	192
50	197
51	202
52	204
53	214
54	227
55	230
56	233
57	235
58	236

n	a(n)
1	1
2	3
3	4
4	6
5	11
6	17
7	22
8	23
9	32
10	34
11	40
12	46
13	47
14	48
15	53
16	59
17	60
18	67
19	71
20	83
21	85
22	89
23	94
24	101
25	106
26	107
27	115
28	118
29	125
30	128
31	131
32	134
33	136
34	137
35	141
36	142
37	149
38	160
39	166
40	167
41	170
42	173
43	177
44	178
45	179
46	184
47	188
48	191
49	192
50	197
51	202
52	204
53	214
54	227
55	230
56	233
57	235
58	236

n	a(n)
1	1
2	3
3	4
4	6
5	11
6	17
7	22
8	23
9	32
10	34
11	40
12	46
13	47
14	48
15	53
16	59
17	60
18	67
19	71
20	83
21	85
22	89
23	94
24	101
25	106
26	107
27	115
28	118
29	125
30	128
31	131
32	134
33	136
34	137
35	141
36	142
37	149
38	160
39	166
40	167
41	170
42	173
43	177
44	178
45	179
46	184
47	188
48	191
49	192
50	197
51	202
52	204
53	214
54	227
55	230
56	233
57	235
58	236