A050465 - cp's OEIS frontend

A050465 a(n) = Sum_{d|n, n/d=3 mod 4} d^2.

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	4
7	1
8	0
9	9
10	0
11	1
12	16
13	0
14	4
15	26
16	0
17	0
18	36
19	1
20	0
21	58
22	4
23	1
24	64
25	0
26	0
27	82
28	16
29	0
30	104
31	1
32	0
33	130
34	0
35	26
36	144
37	0
38	4
39	170
40	0
41	0
42	232
43	1
44	16
45	234
46	4
47	1
48	256
49	49
50	0
51	290
52	0
53	0
54	328
55	26
56	64
57	370
58	0
59	1
60	416
61	0
62	4
63	523
64	0
65	0
66	520
67	1
68	0
69	538
70	104
71	1
72	576
73	0

[0, 0, 1, 0, 0, 4, 1, 0, 9, 0, 1, 16, 0, 4, 26, 0, 0, 36, 1, 0, 58, 4, 1, 64, 0, 0, 82, 16, 0, 104, 1, 0, 130, 0, 26, 144, 0, 4, 170, 0, 0, 232, 1, 16, 234, 4, 1, 256, 49, 0, 290, 0, 0, 328, 26, 64, 370, 0, 1, 416, 0, 4, 523, 0, 0, 520, 1, 0, 538, 104, 1, 576, 0]

cp's OEIS Frontend

A050465 a(n) = Sum_{d|n, n/d=3 mod 4} d^2.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	4
7	1
8	0
9	9
10	0
11	1
12	16
13	0
14	4
15	26
16	0
17	0
18	36
19	1
20	0
21	58
22	4
23	1
24	64
25	0
26	0
27	82
28	16
29	0
30	104
31	1
32	0
33	130
34	0
35	26
36	144
37	0
38	4
39	170
40	0
41	0
42	232
43	1
44	16
45	234
46	4
47	1
48	256
49	49
50	0
51	290
52	0
53	0
54	328
55	26
56	64
57	370
58	0
59	1
60	416
61	0
62	4
63	523
64	0
65	0
66	520
67	1
68	0
69	538
70	104
71	1
72	576
73	0

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	4
7	1
8	0
9	9
10	0
11	1
12	16
13	0
14	4
15	26
16	0
17	0
18	36
19	1
20	0
21	58
22	4
23	1
24	64
25	0
26	0
27	82
28	16
29	0
30	104
31	1
32	0
33	130
34	0
35	26
36	144
37	0
38	4
39	170
40	0
41	0
42	232
43	1
44	16
45	234
46	4
47	1
48	256
49	49
50	0
51	290
52	0
53	0
54	328
55	26
56	64
57	370
58	0
59	1
60	416
61	0
62	4
63	523
64	0
65	0
66	520
67	1
68	0
69	538
70	104
71	1
72	576
73	0

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	4
7	1
8	0
9	9
10	0
11	1
12	16
13	0
14	4
15	26
16	0
17	0
18	36
19	1
20	0
21	58
22	4
23	1
24	64
25	0
26	0
27	82
28	16
29	0
30	104
31	1
32	0
33	130
34	0
35	26
36	144
37	0
38	4
39	170
40	0
41	0
42	232
43	1
44	16
45	234
46	4
47	1
48	256
49	49
50	0
51	290
52	0
53	0
54	328
55	26
56	64
57	370
58	0
59	1
60	416
61	0
62	4
63	523
64	0
65	0
66	520
67	1
68	0
69	538
70	104
71	1
72	576
73	0