A322144 - cp's OEIS frontend

A322144 a(n) = Sum_{i=1..phi(n)-1} (r(i+1)-r(i))^2 where r(1) = 1 < ... < n-1 = r(phi(n)) are the phi(n) integers relatively prime to n.

n	a(n)
1	0
2	0
3	1
4	4
5	3
6	16
7	5
8	12
9	11
10	24
11	9
12	36
13	11
14	32
15	29
16	28
17	15
18	56
19	17
20	52
21	39
22	48
23	21
24	76
25	31
26	56
27	41
28	68
29	27
30	128
31	29
32	60
33	59
34	72
35	57
36	116
37	35
38	80
39	69
40	108
41	39
42	168
43	41
44	100
45	95
46	96
47	45
48	156
49	59
50	136
51	89
52	116
53	51
54	176
55	85
56	140
57	99
58	120
59	57
60	260
61	59
62	128
63	125
64	124
65	99

[0, 0, 1, 4, 3, 16, 5, 12, 11, 24, 9, 36, 11, 32, 29, 28, 15, 56, 17, 52, 39, 48, 21, 76, 31, 56, 41, 68, 27, 128, 29, 60, 59, 72, 57, 116, 35, 80, 69, 108, 39, 168, 41, 100, 95, 96, 45, 156, 59, 136, 89, 116, 51, 176, 85, 140, 99, 120, 57, 260, 59, 128, 125, 124, 99]

cp's OEIS Frontend

A322144 a(n) = Sum_{i=1..phi(n)-1} (r(i+1)-r(i))^2 where r(1) = 1 < ... < n-1 = r(phi(n)) are the phi(n) integers relatively prime to n.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	4
5	3
6	16
7	5
8	12
9	11
10	24
11	9
12	36
13	11
14	32
15	29
16	28
17	15
18	56
19	17
20	52
21	39
22	48
23	21
24	76
25	31
26	56
27	41
28	68
29	27
30	128
31	29
32	60
33	59
34	72
35	57
36	116
37	35
38	80
39	69
40	108
41	39
42	168
43	41
44	100
45	95
46	96
47	45
48	156
49	59
50	136
51	89
52	116
53	51
54	176
55	85
56	140
57	99
58	120
59	57
60	260
61	59
62	128
63	125
64	124
65	99

n	a(n)
1	0
2	0
3	1
4	4
5	3
6	16
7	5
8	12
9	11
10	24
11	9
12	36
13	11
14	32
15	29
16	28
17	15
18	56
19	17
20	52
21	39
22	48
23	21
24	76
25	31
26	56
27	41
28	68
29	27
30	128
31	29
32	60
33	59
34	72
35	57
36	116
37	35
38	80
39	69
40	108
41	39
42	168
43	41
44	100
45	95
46	96
47	45
48	156
49	59
50	136
51	89
52	116
53	51
54	176
55	85
56	140
57	99
58	120
59	57
60	260
61	59
62	128
63	125
64	124
65	99

n	a(n)
1	0
2	0
3	1
4	4
5	3
6	16
7	5
8	12
9	11
10	24
11	9
12	36
13	11
14	32
15	29
16	28
17	15
18	56
19	17
20	52
21	39
22	48
23	21
24	76
25	31
26	56
27	41
28	68
29	27
30	128
31	29
32	60
33	59
34	72
35	57
36	116
37	35
38	80
39	69
40	108
41	39
42	168
43	41
44	100
45	95
46	96
47	45
48	156
49	59
50	136
51	89
52	116
53	51
54	176
55	85
56	140
57	99
58	120
59	57
60	260
61	59
62	128
63	125
64	124
65	99