A284443 - cp's OEIS frontend

A284443 a(n) = Sum_{d|n, d == 2 (mod 7)} d.

n	a(n)
1	0
2	2
3	0
4	2
5	0
6	2
7	0
8	2
9	9
10	2
11	0
12	2
13	0
14	2
15	0
16	18
17	0
18	11
19	0
20	2
21	0
22	2
23	23
24	2
25	0
26	2
27	9
28	2
29	0
30	32
31	0
32	18
33	0
34	2
35	0
36	11
37	37
38	2
39	0
40	2
41	0
42	2
43	0
44	46
45	9
46	25
47	0
48	18
49	0
50	2
51	51
52	2
53	0
54	11
55	0
56	2
57	0
58	60
59	0
60	32
61	0
62	2
63	9
64	18
65	65
66	2
67	0
68	2
69	23
70	2
71	0
72	83
73	0
74	39
75	0
76	2
77	0
78	2
79	79
80	18
81	9

[0, 2, 0, 2, 0, 2, 0, 2, 9, 2, 0, 2, 0, 2, 0, 18, 0, 11, 0, 2, 0, 2, 23, 2, 0, 2, 9, 2, 0, 32, 0, 18, 0, 2, 0, 11, 37, 2, 0, 2, 0, 2, 0, 46, 9, 25, 0, 18, 0, 2, 51, 2, 0, 11, 0, 2, 0, 60, 0, 32, 0, 2, 9, 18, 65, 2, 0, 2, 23, 2, 0, 83, 0, 39, 0, 2, 0, 2, 79, 18, 9]

cp's OEIS Frontend

A284443 a(n) = Sum_{d|n, d == 2 (mod 7)} d.

Table of values

List of values

n	a(n)
1	0
2	2
3	0
4	2
5	0
6	2
7	0
8	2
9	9
10	2
11	0
12	2
13	0
14	2
15	0
16	18
17	0
18	11
19	0
20	2
21	0
22	2
23	23
24	2
25	0
26	2
27	9
28	2
29	0
30	32
31	0
32	18
33	0
34	2
35	0
36	11
37	37
38	2
39	0
40	2
41	0
42	2
43	0
44	46
45	9
46	25
47	0
48	18
49	0
50	2
51	51
52	2
53	0
54	11
55	0
56	2
57	0
58	60
59	0
60	32
61	0
62	2
63	9
64	18
65	65
66	2
67	0
68	2
69	23
70	2
71	0
72	83
73	0
74	39
75	0
76	2
77	0
78	2
79	79
80	18
81	9

n	a(n)
1	0
2	2
3	0
4	2
5	0
6	2
7	0
8	2
9	9
10	2
11	0
12	2
13	0
14	2
15	0
16	18
17	0
18	11
19	0
20	2
21	0
22	2
23	23
24	2
25	0
26	2
27	9
28	2
29	0
30	32
31	0
32	18
33	0
34	2
35	0
36	11
37	37
38	2
39	0
40	2
41	0
42	2
43	0
44	46
45	9
46	25
47	0
48	18
49	0
50	2
51	51
52	2
53	0
54	11
55	0
56	2
57	0
58	60
59	0
60	32
61	0
62	2
63	9
64	18
65	65
66	2
67	0
68	2
69	23
70	2
71	0
72	83
73	0
74	39
75	0
76	2
77	0
78	2
79	79
80	18
81	9

n	a(n)
1	0
2	2
3	0
4	2
5	0
6	2
7	0
8	2
9	9
10	2
11	0
12	2
13	0
14	2
15	0
16	18
17	0
18	11
19	0
20	2
21	0
22	2
23	23
24	2
25	0
26	2
27	9
28	2
29	0
30	32
31	0
32	18
33	0
34	2
35	0
36	11
37	37
38	2
39	0
40	2
41	0
42	2
43	0
44	46
45	9
46	25
47	0
48	18
49	0
50	2
51	51
52	2
53	0
54	11
55	0
56	2
57	0
58	60
59	0
60	32
61	0
62	2
63	9
64	18
65	65
66	2
67	0
68	2
69	23
70	2
71	0
72	83
73	0
74	39
75	0
76	2
77	0
78	2
79	79
80	18
81	9