A050452 - cp's OEIS frontend

A050452 a(n) = Sum_{d|n, d == 3 (mod 4)} d.

n	a(n)
1	0
2	0
3	3
4	0
5	0
6	3
7	7
8	0
9	3
10	0
11	11
12	3
13	0
14	7
15	18
16	0
17	0
18	3
19	19
20	0
21	10
22	11
23	23
24	3
25	0
26	0
27	30
28	7
29	0
30	18
31	31
32	0
33	14
34	0
35	42
36	3
37	0
38	19
39	42
40	0
41	0
42	10
43	43
44	11
45	18
46	23
47	47
48	3
49	7
50	0
51	54
52	0
53	0
54	30
55	66
56	7
57	22
58	0
59	59
60	18
61	0
62	31
63	73
64	0
65	0
66	14
67	67
68	0
69	26
70	42
71	71
72	3
73	0
74	0
75	93
76	19
77	18

[0, 0, 3, 0, 0, 3, 7, 0, 3, 0, 11, 3, 0, 7, 18, 0, 0, 3, 19, 0, 10, 11, 23, 3, 0, 0, 30, 7, 0, 18, 31, 0, 14, 0, 42, 3, 0, 19, 42, 0, 0, 10, 43, 11, 18, 23, 47, 3, 7, 0, 54, 0, 0, 30, 66, 7, 22, 0, 59, 18, 0, 31, 73, 0, 0, 14, 67, 0, 26, 42, 71, 3, 0, 0, 93, 19, 18]

cp's OEIS Frontend

A050452 a(n) = Sum_{d|n, d == 3 (mod 4)} d.

Table of values

List of values

n	a(n)
1	0
2	0
3	3
4	0
5	0
6	3
7	7
8	0
9	3
10	0
11	11
12	3
13	0
14	7
15	18
16	0
17	0
18	3
19	19
20	0
21	10
22	11
23	23
24	3
25	0
26	0
27	30
28	7
29	0
30	18
31	31
32	0
33	14
34	0
35	42
36	3
37	0
38	19
39	42
40	0
41	0
42	10
43	43
44	11
45	18
46	23
47	47
48	3
49	7
50	0
51	54
52	0
53	0
54	30
55	66
56	7
57	22
58	0
59	59
60	18
61	0
62	31
63	73
64	0
65	0
66	14
67	67
68	0
69	26
70	42
71	71
72	3
73	0
74	0
75	93
76	19
77	18

n	a(n)
1	0
2	0
3	3
4	0
5	0
6	3
7	7
8	0
9	3
10	0
11	11
12	3
13	0
14	7
15	18
16	0
17	0
18	3
19	19
20	0
21	10
22	11
23	23
24	3
25	0
26	0
27	30
28	7
29	0
30	18
31	31
32	0
33	14
34	0
35	42
36	3
37	0
38	19
39	42
40	0
41	0
42	10
43	43
44	11
45	18
46	23
47	47
48	3
49	7
50	0
51	54
52	0
53	0
54	30
55	66
56	7
57	22
58	0
59	59
60	18
61	0
62	31
63	73
64	0
65	0
66	14
67	67
68	0
69	26
70	42
71	71
72	3
73	0
74	0
75	93
76	19
77	18

n	a(n)
1	0
2	0
3	3
4	0
5	0
6	3
7	7
8	0
9	3
10	0
11	11
12	3
13	0
14	7
15	18
16	0
17	0
18	3
19	19
20	0
21	10
22	11
23	23
24	3
25	0
26	0
27	30
28	7
29	0
30	18
31	31
32	0
33	14
34	0
35	42
36	3
37	0
38	19
39	42
40	0
41	0
42	10
43	43
44	11
45	18
46	23
47	47
48	3
49	7
50	0
51	54
52	0
53	0
54	30
55	66
56	7
57	22
58	0
59	59
60	18
61	0
62	31
63	73
64	0
65	0
66	14
67	67
68	0
69	26
70	42
71	71
72	3
73	0
74	0
75	93
76	19
77	18