A340762 - cp's OEIS frontend

A340762 Numbers k such that iterations of phi(k), phi(phi(k)), ... end in ... 4, 2, 1.

n	a(n)
1	4
2	5
3	8
4	10
5	11
6	12
7	13
8	15
9	16
10	17
11	20
12	21
13	22
14	23
15	24
16	25
17	26
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	36
27	37
28	39
29	40
30	41
31	42
32	43
33	44
34	45
35	46
36	47
37	48
38	49
39	50
40	51
41	52
42	53
43	55
44	56
45	57
46	58
47	59
48	60
49	61
50	62
51	63
52	64
53	65
54	66
55	67
56	68
57	69
58	70
59	71
60	72

[4, 5, 8, 10, 11, 12, 13, 15, 16, 17, 20, 21, 22, 23, 24, 25, 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72]

cp's OEIS Frontend

A340762 Numbers k such that iterations of phi(k), phi(phi(k)), ... end in ... 4, 2, 1.

Table of values

List of values

n	a(n)
1	4
2	5
3	8
4	10
5	11
6	12
7	13
8	15
9	16
10	17
11	20
12	21
13	22
14	23
15	24
16	25
17	26
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	36
27	37
28	39
29	40
30	41
31	42
32	43
33	44
34	45
35	46
36	47
37	48
38	49
39	50
40	51
41	52
42	53
43	55
44	56
45	57
46	58
47	59
48	60
49	61
50	62
51	63
52	64
53	65
54	66
55	67
56	68
57	69
58	70
59	71
60	72

n	a(n)
1	4
2	5
3	8
4	10
5	11
6	12
7	13
8	15
9	16
10	17
11	20
12	21
13	22
14	23
15	24
16	25
17	26
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	36
27	37
28	39
29	40
30	41
31	42
32	43
33	44
34	45
35	46
36	47
37	48
38	49
39	50
40	51
41	52
42	53
43	55
44	56
45	57
46	58
47	59
48	60
49	61
50	62
51	63
52	64
53	65
54	66
55	67
56	68
57	69
58	70
59	71
60	72

n	a(n)
1	4
2	5
3	8
4	10
5	11
6	12
7	13
8	15
9	16
10	17
11	20
12	21
13	22
14	23
15	24
16	25
17	26
18	28
19	29
20	30
21	31
22	32
23	33
24	34
25	35
26	36
27	37
28	39
29	40
30	41
31	42
32	43
33	44
34	45
35	46
36	47
37	48
38	49
39	50
40	51
41	52
42	53
43	55
44	56
45	57
46	58
47	59
48	60
49	61
50	62
51	63
52	64
53	65
54	66
55	67
56	68
57	69
58	70
59	71
60	72