A296655 - cp's OEIS frontend

A296655 Numbers k such that phi(x) = k has a positive even number of solutions.

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	24
10	28
11	30
12	36
13	42
14	46
15	52
16	54
17	58
18	64
19	66
20	70
21	78
22	80
23	82
24	84
25	88
26	100
27	102
28	106
29	110
30	112
31	126
32	130
33	136
34	138
35	148
36	150
37	160
38	162
39	166
40	168
41	172
42	176
43	178
44	180
45	184
46	190
47	196
48	198
49	200
50	208
51	210
52	222
53	224
54	226
55	228
56	232
57	238
58	250

[1, 4, 6, 10, 12, 16, 18, 22, 24, 28, 30, 36, 42, 46, 52, 54, 58, 64, 66, 70, 78, 80, 82, 84, 88, 100, 102, 106, 110, 112, 126, 130, 136, 138, 148, 150, 160, 162, 166, 168, 172, 176, 178, 180, 184, 190, 196, 198, 200, 208, 210, 222, 224, 226, 228, 232, 238, 250]

cp's OEIS Frontend

A296655 Numbers k such that phi(x) = k has a positive even number of solutions.

Table of values

List of values

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	24
10	28
11	30
12	36
13	42
14	46
15	52
16	54
17	58
18	64
19	66
20	70
21	78
22	80
23	82
24	84
25	88
26	100
27	102
28	106
29	110
30	112
31	126
32	130
33	136
34	138
35	148
36	150
37	160
38	162
39	166
40	168
41	172
42	176
43	178
44	180
45	184
46	190
47	196
48	198
49	200
50	208
51	210
52	222
53	224
54	226
55	228
56	232
57	238
58	250

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	24
10	28
11	30
12	36
13	42
14	46
15	52
16	54
17	58
18	64
19	66
20	70
21	78
22	80
23	82
24	84
25	88
26	100
27	102
28	106
29	110
30	112
31	126
32	130
33	136
34	138
35	148
36	150
37	160
38	162
39	166
40	168
41	172
42	176
43	178
44	180
45	184
46	190
47	196
48	198
49	200
50	208
51	210
52	222
53	224
54	226
55	228
56	232
57	238
58	250

n	a(n)
1	1
2	4
3	6
4	10
5	12
6	16
7	18
8	22
9	24
10	28
11	30
12	36
13	42
14	46
15	52
16	54
17	58
18	64
19	66
20	70
21	78
22	80
23	82
24	84
25	88
26	100
27	102
28	106
29	110
30	112
31	126
32	130
33	136
34	138
35	148
36	150
37	160
38	162
39	166
40	168
41	172
42	176
43	178
44	180
45	184
46	190
47	196
48	198
49	200
50	208
51	210
52	222
53	224
54	226
55	228
56	232
57	238
58	250