A318527 - cp's OEIS frontend

A318527 Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.

n	a(n)
1	1
2	721
3	4681
4	6121
5	6481
6	7201
7	7561
8	9001
9	11161
10	14401
11	16921
12	18361
13	19441
14	20521
15	24481
16	24841
17	27361
18	29881
19	32761
20	36721
21	39241
22	39601
23	42121
24	42841
25	43201
26	47161
27	47521
28	48241
29	49681
30	51121
31	52201
32	53641
33	60481
34	61561
35	62641
36	63361
37	64441
38	65521
39	65881
40	68041
41	73441
42	73801
43	74521
44	74881
45	75961
46	76321
47	78481
48	82441
49	82801
50	84241
51	88201
52	91081
53	94681

[1, 721, 4681, 6121, 6481, 7201, 7561, 9001, 11161, 14401, 16921, 18361, 19441, 20521, 24481, 24841, 27361, 29881, 32761, 36721, 39241, 39601, 42121, 42841, 43201, 47161, 47521, 48241, 49681, 51121, 52201, 53641, 60481, 61561, 62641, 63361, 64441, 65521, 65881, 68041, 73441, 73801, 74521, 74881, 75961, 76321, 78481, 82441, 82801, 84241, 88201, 91081, 94681]

cp's OEIS Frontend

A318527 Numbers k such that -3 is a quadratic residue (not necessarily coprime) modulo k, k + 1, k + 2 and k + 3.

Table of values

List of values