A270819 - cp's OEIS frontend

A270819 a(n) is the number of arithmetic progressions of length 3 among the quadratic residues modulo prime(n).

n	a(n)
1	0
2	0
3	0
4	0
5	10
6	12
7	16
8	36
9	44
10	84
11	90
12	144
13	160
14	210
15	230
16	312
17	406
18	420
19	528
20	560
21	576
22	702
23	820
24	880
25	1056
26	1200
27	1224
28	1378
29	1404
30	1456
31	1890
32	2080
33	2176
34	2346
35	2664
36	2700
37	2964
38	3240
39	3320
40	3612
41	3916
42	3960
43	4370
44	4416
45	4704
46	4752
47	5460
48	5994
49	6328
50	6384
51	6496

[0, 0, 0, 0, 10, 12, 16, 36, 44, 84, 90, 144, 160, 210, 230, 312, 406, 420, 528, 560, 576, 702, 820, 880, 1056, 1200, 1224, 1378, 1404, 1456, 1890, 2080, 2176, 2346, 2664, 2700, 2964, 3240, 3320, 3612, 3916, 3960, 4370, 4416, 4704, 4752, 5460, 5994, 6328, 6384, 6496]

cp's OEIS Frontend

A270819 a(n) is the number of arithmetic progressions of length 3 among the quadratic residues modulo prime(n).

Table of values

List of values