A071386 - cp's OEIS frontend

A071386 Numbers k such that the cardinality of the set of solutions to phi(x) = k is odd.

n	a(n)
1	2
2	8
3	20
4	32
5	40
6	44
7	48
8	56
9	60
10	72
11	92
12	96
13	104
14	108
15	116
16	120
17	128
18	132
19	140
20	144
21	156
22	164
23	192
24	204
25	212
26	216
27	220
28	240
29	252
30	260
31	272
32	276
33	296
34	300
35	332
36	344
37	356
38	360
39	368
40	380
41	384
42	392
43	396
44	400
45	416
46	420
47	440
48	444
49	452
50	456
51	476
52	480
53	500
54	504
55	512

[2, 8, 20, 32, 40, 44, 48, 56, 60, 72, 92, 96, 104, 108, 116, 120, 128, 132, 140, 144, 156, 164, 192, 204, 212, 216, 220, 240, 252, 260, 272, 276, 296, 300, 332, 344, 356, 360, 368, 380, 384, 392, 396, 400, 416, 420, 440, 444, 452, 456, 476, 480, 500, 504, 512]

cp's OEIS Frontend

A071386 Numbers k such that the cardinality of the set of solutions to phi(x) = k is odd.

Table of values

List of values

n	a(n)
1	2
2	8
3	20
4	32
5	40
6	44
7	48
8	56
9	60
10	72
11	92
12	96
13	104
14	108
15	116
16	120
17	128
18	132
19	140
20	144
21	156
22	164
23	192
24	204
25	212
26	216
27	220
28	240
29	252
30	260
31	272
32	276
33	296
34	300
35	332
36	344
37	356
38	360
39	368
40	380
41	384
42	392
43	396
44	400
45	416
46	420
47	440
48	444
49	452
50	456
51	476
52	480
53	500
54	504
55	512

n	a(n)
1	2
2	8
3	20
4	32
5	40
6	44
7	48
8	56
9	60
10	72
11	92
12	96
13	104
14	108
15	116
16	120
17	128
18	132
19	140
20	144
21	156
22	164
23	192
24	204
25	212
26	216
27	220
28	240
29	252
30	260
31	272
32	276
33	296
34	300
35	332
36	344
37	356
38	360
39	368
40	380
41	384
42	392
43	396
44	400
45	416
46	420
47	440
48	444
49	452
50	456
51	476
52	480
53	500
54	504
55	512

n	a(n)
1	2
2	8
3	20
4	32
5	40
6	44
7	48
8	56
9	60
10	72
11	92
12	96
13	104
14	108
15	116
16	120
17	128
18	132
19	140
20	144
21	156
22	164
23	192
24	204
25	212
26	216
27	220
28	240
29	252
30	260
31	272
32	276
33	296
34	300
35	332
36	344
37	356
38	360
39	368
40	380
41	384
42	392
43	396
44	400
45	416
46	420
47	440
48	444
49	452
50	456
51	476
52	480
53	500
54	504
55	512