A069087 - cp's OEIS frontend

A069087 Numbers m such that (1/m)Sum_{k=1..m} core(k) > phi(m) where core(n) = A007913(n) is the squarefree part of n: the smallest number such that na(n) is a square and phi(n) = A000010(n) is the Euler totient function.

n	a(n)
1	2
2	6
3	12
4	18
5	24
6	30
7	36
8	42
9	48
10	60
11	66
12	72
13	78
14	84
15	90
16	96
17	102
18	114
19	120
20	126
21	132
22	138
23	144
24	150
25	156
26	168
27	174
28	180
29	186
30	198
31	204
32	210
33	222
34	228
35	234
36	240
37	246
38	252
39	258
40	264
41	270
42	276
43	282
44	294
45	300
46	306
47	312
48	318
49	330
50	336
51	342
52	348
53	360
54	372
55	378
56	390

[2, 6, 12, 18, 24, 30, 36, 42, 48, 60, 66, 72, 78, 84, 90, 96, 102, 114, 120, 126, 132, 138, 144, 150, 156, 168, 174, 180, 186, 198, 204, 210, 222, 228, 234, 240, 246, 252, 258, 264, 270, 276, 282, 294, 300, 306, 312, 318, 330, 336, 342, 348, 360, 372, 378, 390]

cp's OEIS Frontend

A069087 Numbers m such that (1/m)Sum_{k=1..m} core(k) > phi(m) where core(n) = A007913(n) is the squarefree part of n: the smallest number such that na(n) is a square and phi(n) = A000010(n) is the Euler totient function.

Table of values

List of values

n	a(n)
1	2
2	6
3	12
4	18
5	24
6	30
7	36
8	42
9	48
10	60
11	66
12	72
13	78
14	84
15	90
16	96
17	102
18	114
19	120
20	126
21	132
22	138
23	144
24	150
25	156
26	168
27	174
28	180
29	186
30	198
31	204
32	210
33	222
34	228
35	234
36	240
37	246
38	252
39	258
40	264
41	270
42	276
43	282
44	294
45	300
46	306
47	312
48	318
49	330
50	336
51	342
52	348
53	360
54	372
55	378
56	390

n	a(n)
1	2
2	6
3	12
4	18
5	24
6	30
7	36
8	42
9	48
10	60
11	66
12	72
13	78
14	84
15	90
16	96
17	102
18	114
19	120
20	126
21	132
22	138
23	144
24	150
25	156
26	168
27	174
28	180
29	186
30	198
31	204
32	210
33	222
34	228
35	234
36	240
37	246
38	252
39	258
40	264
41	270
42	276
43	282
44	294
45	300
46	306
47	312
48	318
49	330
50	336
51	342
52	348
53	360
54	372
55	378
56	390

cp's OEIS Frontend

A069087 Numbers m such that (1/m)*Sum_{k=1..m} core(k) > phi(m) where core(n) = A007913(n) is the squarefree part of n: the smallest number such that n*a(n) is a square and phi(n) = A000010(n) is the Euler totient function.

Table of values

List of values

A069087 Numbers m such that (1/m)Sum_{k=1..m} core(k) > phi(m) where core(n) = A007913(n) is the squarefree part of n: the smallest number such that na(n) is a square and phi(n) = A000010(n) is the Euler totient function.

n	a(n)
1	2
2	6
3	12
4	18
5	24
6	30
7	36
8	42
9	48
10	60
11	66
12	72
13	78
14	84
15	90
16	96
17	102
18	114
19	120
20	126
21	132
22	138
23	144
24	150
25	156
26	168
27	174
28	180
29	186
30	198
31	204
32	210
33	222
34	228
35	234
36	240
37	246
38	252
39	258
40	264
41	270
42	276
43	282
44	294
45	300
46	306
47	312
48	318
49	330
50	336
51	342
52	348
53	360
54	372
55	378
56	390