A318879 - cp's OEIS frontend

A318879 a(n) = Sum_{d|n} [d-(2phi(d)) > 0](d-(2*phi(d))).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	6
13	0
14	2
15	0
16	0
17	0
18	8
19	0
20	6
21	0
22	2
23	0
24	14
25	0
26	2
27	0
28	6
29	0
30	18
31	0
32	0
33	0
34	2
35	0
36	24
37	0
38	2
39	0
40	14
41	0
42	22
43	0
44	6
45	0
46	2
47	0
48	30
49	0
50	12
51	0
52	6
53	0
54	26
55	0
56	14
57	0
58	2
59	0
60	54
61	0
62	2
63	0
64	0
65	0
66	30
67	0
68	6
69	0
70	26
71	0
72	56
73	0
74	2
75	0
76	6
77	0
78	34
79	0
80	30
81	0
82	2
83	0
84	66
85	0
86	2
87	0
88	14
89	0
90	66
91	0
92	6
93	0
94	2
95	0
96	62
97	0
98	16
99	0
100	36
101	0
102	42
103	0
104	14
105	9

[0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 6, 0, 2, 0, 0, 0, 8, 0, 6, 0, 2, 0, 14, 0, 2, 0, 6, 0, 18, 0, 0, 0, 2, 0, 24, 0, 2, 0, 14, 0, 22, 0, 6, 0, 2, 0, 30, 0, 12, 0, 6, 0, 26, 0, 14, 0, 2, 0, 54, 0, 2, 0, 0, 0, 30, 0, 6, 0, 26, 0, 56, 0, 2, 0, 6, 0, 34, 0, 30, 0, 2, 0, 66, 0, 2, 0, 14, 0, 66, 0, 6, 0, 2, 0, 62, 0, 16, 0, 36, 0, 42, 0, 14, 9]

cp's OEIS Frontend

A318879 a(n) = Sum_{d|n} [d-(2phi(d)) > 0](d-(2*phi(d))).

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	6
13	0
14	2
15	0
16	0
17	0
18	8
19	0
20	6
21	0
22	2
23	0
24	14
25	0
26	2
27	0
28	6
29	0
30	18
31	0
32	0
33	0
34	2
35	0
36	24
37	0
38	2
39	0
40	14
41	0
42	22
43	0
44	6
45	0
46	2
47	0
48	30
49	0
50	12
51	0
52	6
53	0
54	26
55	0
56	14
57	0
58	2
59	0
60	54
61	0
62	2
63	0
64	0
65	0
66	30
67	0
68	6
69	0
70	26
71	0
72	56
73	0
74	2
75	0
76	6
77	0
78	34
79	0
80	30
81	0
82	2
83	0
84	66
85	0
86	2
87	0
88	14
89	0
90	66
91	0
92	6
93	0
94	2
95	0
96	62
97	0
98	16
99	0
100	36
101	0
102	42
103	0
104	14
105	9

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	6
13	0
14	2
15	0
16	0
17	0
18	8
19	0
20	6
21	0
22	2
23	0
24	14
25	0
26	2
27	0
28	6
29	0
30	18
31	0
32	0
33	0
34	2
35	0
36	24
37	0
38	2
39	0
40	14
41	0
42	22
43	0
44	6
45	0
46	2
47	0
48	30
49	0
50	12
51	0
52	6
53	0
54	26
55	0
56	14
57	0
58	2
59	0
60	54
61	0
62	2
63	0
64	0
65	0
66	30
67	0
68	6
69	0
70	26
71	0
72	56
73	0
74	2
75	0
76	6
77	0
78	34
79	0
80	30
81	0
82	2
83	0
84	66
85	0
86	2
87	0
88	14
89	0
90	66
91	0
92	6
93	0
94	2
95	0
96	62
97	0
98	16
99	0
100	36
101	0
102	42
103	0
104	14
105	9

cp's OEIS Frontend

A318879 a(n) = Sum_{d|n} [d-(2*phi(d)) > 0]*(d-(2*phi(d))).

Table of values

List of values

A318879 a(n) = Sum_{d|n} [d-(2phi(d)) > 0](d-(2*phi(d))).

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	2
7	0
8	0
9	0
10	2
11	0
12	6
13	0
14	2
15	0
16	0
17	0
18	8
19	0
20	6
21	0
22	2
23	0
24	14
25	0
26	2
27	0
28	6
29	0
30	18
31	0
32	0
33	0
34	2
35	0
36	24
37	0
38	2
39	0
40	14
41	0
42	22
43	0
44	6
45	0
46	2
47	0
48	30
49	0
50	12
51	0
52	6
53	0
54	26
55	0
56	14
57	0
58	2
59	0
60	54
61	0
62	2
63	0
64	0
65	0
66	30
67	0
68	6
69	0
70	26
71	0
72	56
73	0
74	2
75	0
76	6
77	0
78	34
79	0
80	30
81	0
82	2
83	0
84	66
85	0
86	2
87	0
88	14
89	0
90	66
91	0
92	6
93	0
94	2
95	0
96	62
97	0
98	16
99	0
100	36
101	0
102	42
103	0
104	14
105	9