A050470 - cp's OEIS frontend

A050470 a(n) = Sum_{d|n, n/d == 1 (mod 4)} d^2 - Sum_{d|n, n/d == 3 (mod 4)} d^2.

n	a(n)
1	1
2	4
3	8
4	16
5	26
6	32
7	48
8	64
9	73
10	104
11	120
12	128
13	170
14	192
15	208
16	256
17	290
18	292
19	360
20	416
21	384
22	480
23	528
24	512
25	651
26	680
27	656
28	768
29	842
30	832
31	960
32	1024
33	960
34	1160
35	1248
36	1168
37	1370
38	1440
39	1360
40	1664
41	1682
42	1536
43	1848
44	1920
45	1898
46	2112
47	2208
48	2048
49	2353
50	2604

[1, 4, 8, 16, 26, 32, 48, 64, 73, 104, 120, 128, 170, 192, 208, 256, 290, 292, 360, 416, 384, 480, 528, 512, 651, 680, 656, 768, 842, 832, 960, 1024, 960, 1160, 1248, 1168, 1370, 1440, 1360, 1664, 1682, 1536, 1848, 1920, 1898, 2112, 2208, 2048, 2353, 2604]

cp's OEIS Frontend

A050470 a(n) = Sum_{d|n, n/d == 1 (mod 4)} d^2 - Sum_{d|n, n/d == 3 (mod 4)} d^2.

Table of values

List of values