A050449 - cp's OEIS frontend

A050449 a(n) = Sum_{d|n, d == 1 (mod 4)} d.

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

[1, 1, 1, 1, 6, 1, 1, 1, 10, 6, 1, 1, 14, 1, 6, 1, 18, 10, 1, 6, 22, 1, 1, 1, 31, 14, 10, 1, 30, 6, 1, 1, 34, 18, 6, 10, 38, 1, 14, 6, 42, 22, 1, 1, 60, 1, 1, 1, 50, 31, 18, 14, 54, 10, 6, 1, 58, 30, 1, 6, 62, 1, 31, 1, 84, 34, 1, 18, 70, 6, 1, 10, 74, 38, 31, 1]

cp's OEIS Frontend

A050449 a(n) = Sum_{d|n, d == 1 (mod 4)} d.

Table of values

List of values

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

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

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