A363804 - cp's OEIS frontend

A363804 a(n) = Sum_{d|n, d == 0, 3, or 4 mod 7} d.

n	a(n)
1	0
2	0
3	3
4	4
5	0
6	3
7	7
8	4
9	3
10	10
11	11
12	7
13	0
14	21
15	3
16	4
17	17
18	21
19	0
20	14
21	31
22	11
23	0
24	31
25	25
26	0
27	3
28	53
29	0
30	13
31	31
32	36
33	14
34	17
35	42
36	25
37	0
38	38
39	42
40	14
41	0
42	87
43	0
44	15
45	48
46	46
47	0
48	31
49	56
50	35
51	20
52	56
53	53
54	21
55	11
56	109
57	3
58	0
59	59
60	77
61	0
62	31
63	94
64	36
65	0
66	80
67	67
68	21
69	3
70	136
71	0
72	49
73	73
74	74
75	28
76	42
77	95
78	42
79	0
80	94
81	84
82	0
83	0

[0, 0, 3, 4, 0, 3, 7, 4, 3, 10, 11, 7, 0, 21, 3, 4, 17, 21, 0, 14, 31, 11, 0, 31, 25, 0, 3, 53, 0, 13, 31, 36, 14, 17, 42, 25, 0, 38, 42, 14, 0, 87, 0, 15, 48, 46, 0, 31, 56, 35, 20, 56, 53, 21, 11, 109, 3, 0, 59, 77, 0, 31, 94, 36, 0, 80, 67, 21, 3, 136, 0, 49, 73, 74, 28, 42, 95, 42, 0, 94, 84, 0, 0]

cp's OEIS Frontend

A363804 a(n) = Sum_{d|n, d == 0, 3, or 4 mod 7} d.

Table of values

List of values

n	a(n)
1	0
2	0
3	3
4	4
5	0
6	3
7	7
8	4
9	3
10	10
11	11
12	7
13	0
14	21
15	3
16	4
17	17
18	21
19	0
20	14
21	31
22	11
23	0
24	31
25	25
26	0
27	3
28	53
29	0
30	13
31	31
32	36
33	14
34	17
35	42
36	25
37	0
38	38
39	42
40	14
41	0
42	87
43	0
44	15
45	48
46	46
47	0
48	31
49	56
50	35
51	20
52	56
53	53
54	21
55	11
56	109
57	3
58	0
59	59
60	77
61	0
62	31
63	94
64	36
65	0
66	80
67	67
68	21
69	3
70	136
71	0
72	49
73	73
74	74
75	28
76	42
77	95
78	42
79	0
80	94
81	84
82	0
83	0

n	a(n)
1	0
2	0
3	3
4	4
5	0
6	3
7	7
8	4
9	3
10	10
11	11
12	7
13	0
14	21
15	3
16	4
17	17
18	21
19	0
20	14
21	31
22	11
23	0
24	31
25	25
26	0
27	3
28	53
29	0
30	13
31	31
32	36
33	14
34	17
35	42
36	25
37	0
38	38
39	42
40	14
41	0
42	87
43	0
44	15
45	48
46	46
47	0
48	31
49	56
50	35
51	20
52	56
53	53
54	21
55	11
56	109
57	3
58	0
59	59
60	77
61	0
62	31
63	94
64	36
65	0
66	80
67	67
68	21
69	3
70	136
71	0
72	49
73	73
74	74
75	28
76	42
77	95
78	42
79	0
80	94
81	84
82	0
83	0

n	a(n)
1	0
2	0
3	3
4	4
5	0
6	3
7	7
8	4
9	3
10	10
11	11
12	7
13	0
14	21
15	3
16	4
17	17
18	21
19	0
20	14
21	31
22	11
23	0
24	31
25	25
26	0
27	3
28	53
29	0
30	13
31	31
32	36
33	14
34	17
35	42
36	25
37	0
38	38
39	42
40	14
41	0
42	87
43	0
44	15
45	48
46	46
47	0
48	31
49	56
50	35
51	20
52	56
53	53
54	21
55	11
56	109
57	3
58	0
59	59
60	77
61	0
62	31
63	94
64	36
65	0
66	80
67	67
68	21
69	3
70	136
71	0
72	49
73	73
74	74
75	28
76	42
77	95
78	42
79	0
80	94
81	84
82	0
83	0