A363803 - cp's OEIS frontend

A363803 a(n) = Sum_{d|n, d == 0, 2, or 5 mod 7} d.

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	2
7	7
8	2
9	9
10	7
11	0
12	14
13	0
14	23
15	5
16	18
17	0
18	11
19	19
20	7
21	28
22	2
23	23
24	14
25	5
26	28
27	9
28	51
29	0
30	37
31	0
32	18
33	33
34	2
35	47
36	23
37	37
38	21
39	0
40	47
41	0
42	86
43	0
44	46
45	14
46	25
47	47
48	30
49	56
50	7
51	51
52	28
53	0
54	65
55	5
56	107
57	19
58	60
59	0
60	49
61	61
62	2
63	100
64	18
65	70
66	35
67	0
68	70
69	23
70	133
71	0
72	95
73	0
74	39
75	80
76	21
77	84
78	28
79	79
80	63
81	9
82	84
83	0

[0, 2, 0, 2, 5, 2, 7, 2, 9, 7, 0, 14, 0, 23, 5, 18, 0, 11, 19, 7, 28, 2, 23, 14, 5, 28, 9, 51, 0, 37, 0, 18, 33, 2, 47, 23, 37, 21, 0, 47, 0, 86, 0, 46, 14, 25, 47, 30, 56, 7, 51, 28, 0, 65, 5, 107, 19, 60, 0, 49, 61, 2, 100, 18, 70, 35, 0, 70, 23, 133, 0, 95, 0, 39, 80, 21, 84, 28, 79, 63, 9, 84, 0]

cp's OEIS Frontend

A363803 a(n) = Sum_{d|n, d == 0, 2, or 5 mod 7} d.

Table of values

List of values

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	2
7	7
8	2
9	9
10	7
11	0
12	14
13	0
14	23
15	5
16	18
17	0
18	11
19	19
20	7
21	28
22	2
23	23
24	14
25	5
26	28
27	9
28	51
29	0
30	37
31	0
32	18
33	33
34	2
35	47
36	23
37	37
38	21
39	0
40	47
41	0
42	86
43	0
44	46
45	14
46	25
47	47
48	30
49	56
50	7
51	51
52	28
53	0
54	65
55	5
56	107
57	19
58	60
59	0
60	49
61	61
62	2
63	100
64	18
65	70
66	35
67	0
68	70
69	23
70	133
71	0
72	95
73	0
74	39
75	80
76	21
77	84
78	28
79	79
80	63
81	9
82	84
83	0

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	2
7	7
8	2
9	9
10	7
11	0
12	14
13	0
14	23
15	5
16	18
17	0
18	11
19	19
20	7
21	28
22	2
23	23
24	14
25	5
26	28
27	9
28	51
29	0
30	37
31	0
32	18
33	33
34	2
35	47
36	23
37	37
38	21
39	0
40	47
41	0
42	86
43	0
44	46
45	14
46	25
47	47
48	30
49	56
50	7
51	51
52	28
53	0
54	65
55	5
56	107
57	19
58	60
59	0
60	49
61	61
62	2
63	100
64	18
65	70
66	35
67	0
68	70
69	23
70	133
71	0
72	95
73	0
74	39
75	80
76	21
77	84
78	28
79	79
80	63
81	9
82	84
83	0

n	a(n)
1	0
2	2
3	0
4	2
5	5
6	2
7	7
8	2
9	9
10	7
11	0
12	14
13	0
14	23
15	5
16	18
17	0
18	11
19	19
20	7
21	28
22	2
23	23
24	14
25	5
26	28
27	9
28	51
29	0
30	37
31	0
32	18
33	33
34	2
35	47
36	23
37	37
38	21
39	0
40	47
41	0
42	86
43	0
44	46
45	14
46	25
47	47
48	30
49	56
50	7
51	51
52	28
53	0
54	65
55	5
56	107
57	19
58	60
59	0
60	49
61	61
62	2
63	100
64	18
65	70
66	35
67	0
68	70
69	23
70	133
71	0
72	95
73	0
74	39
75	80
76	21
77	84
78	28
79	79
80	63
81	9
82	84
83	0