A221178 - cp's OEIS frontend

A221178 Union of (prime powers minus 1) and values of Euler totient function.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	10
10	12
11	15
12	16
13	18
14	20
15	22
16	24
17	26
18	28
19	30
20	31
21	32
22	36
23	40
24	42
25	44
26	46
27	48
28	52
29	54
30	56
31	58
32	60
33	63
34	64
35	66
36	70
37	72
38	78
39	80
40	82
41	84
42	88
43	92
44	96
45	100
46	102
47	104
48	106
49	108
50	110
51	112
52	116
53	120
54	124
55	126
56	127
57	128
58	130
59	132
60	136
61	138
62	140
63	144
64	148
65	150
66	156
67	160
68	162
69	164
70	166
71	168
72	172
73	176

[0, 1, 2, 3, 4, 6, 7, 8, 10, 12, 15, 16, 18, 20, 22, 24, 26, 28, 30, 31, 32, 36, 40, 42, 44, 46, 48, 52, 54, 56, 58, 60, 63, 64, 66, 70, 72, 78, 80, 82, 84, 88, 92, 96, 100, 102, 104, 106, 108, 110, 112, 116, 120, 124, 126, 127, 128, 130, 132, 136, 138, 140, 144, 148, 150, 156, 160, 162, 164, 166, 168, 172, 176]

cp's OEIS Frontend

A221178 Union of (prime powers minus 1) and values of Euler totient function.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	10
10	12
11	15
12	16
13	18
14	20
15	22
16	24
17	26
18	28
19	30
20	31
21	32
22	36
23	40
24	42
25	44
26	46
27	48
28	52
29	54
30	56
31	58
32	60
33	63
34	64
35	66
36	70
37	72
38	78
39	80
40	82
41	84
42	88
43	92
44	96
45	100
46	102
47	104
48	106
49	108
50	110
51	112
52	116
53	120
54	124
55	126
56	127
57	128
58	130
59	132
60	136
61	138
62	140
63	144
64	148
65	150
66	156
67	160
68	162
69	164
70	166
71	168
72	172
73	176

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	10
10	12
11	15
12	16
13	18
14	20
15	22
16	24
17	26
18	28
19	30
20	31
21	32
22	36
23	40
24	42
25	44
26	46
27	48
28	52
29	54
30	56
31	58
32	60
33	63
34	64
35	66
36	70
37	72
38	78
39	80
40	82
41	84
42	88
43	92
44	96
45	100
46	102
47	104
48	106
49	108
50	110
51	112
52	116
53	120
54	124
55	126
56	127
57	128
58	130
59	132
60	136
61	138
62	140
63	144
64	148
65	150
66	156
67	160
68	162
69	164
70	166
71	168
72	172
73	176

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	6
7	7
8	8
9	10
10	12
11	15
12	16
13	18
14	20
15	22
16	24
17	26
18	28
19	30
20	31
21	32
22	36
23	40
24	42
25	44
26	46
27	48
28	52
29	54
30	56
31	58
32	60
33	63
34	64
35	66
36	70
37	72
38	78
39	80
40	82
41	84
42	88
43	92
44	96
45	100
46	102
47	104
48	106
49	108
50	110
51	112
52	116
53	120
54	124
55	126
56	127
57	128
58	130
59	132
60	136
61	138
62	140
63	144
64	148
65	150
66	156
67	160
68	162
69	164
70	166
71	168
72	172
73	176