A232681 - cp's OEIS frontend

A232681 Numbers n such that the equation a^2 + 5nb^2 = 5c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

n	a(n)
1	2
2	3
3	6
4	7
5	8
6	10
7	12
8	13
9	14
10	15
11	17
12	18
13	21
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	32
22	33
23	34
24	35
25	37
26	38
27	39
28	40
29	42
30	43
31	46
32	47
33	48
34	50
35	51
36	52
37	53
38	54
39	56
40	57
41	58
42	60
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	72
52	73
53	74
54	75
55	77
56	78
57	82
58	83
59	84
60	85
61	86
62	87
63	88
64	90
65	91
66	92
67	93
68	94
69	96
70	97
71	98

[2, 3, 6, 7, 8, 10, 12, 13, 14, 15, 17, 18, 21, 22, 23, 24, 26, 27, 28, 30, 32, 33, 34, 35, 37, 38, 39, 40, 42, 43, 46, 47, 48, 50, 51, 52, 53, 54, 56, 57, 58, 60, 62, 63, 65, 66, 67, 68, 69, 70, 72, 73, 74, 75, 77, 78, 82, 83, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 96, 97, 98]

cp's OEIS Frontend

A232681 Numbers n such that the equation a^2 + 5nb^2 = 5c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

Table of values

List of values

n	a(n)
1	2
2	3
3	6
4	7
5	8
6	10
7	12
8	13
9	14
10	15
11	17
12	18
13	21
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	32
22	33
23	34
24	35
25	37
26	38
27	39
28	40
29	42
30	43
31	46
32	47
33	48
34	50
35	51
36	52
37	53
38	54
39	56
40	57
41	58
42	60
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	72
52	73
53	74
54	75
55	77
56	78
57	82
58	83
59	84
60	85
61	86
62	87
63	88
64	90
65	91
66	92
67	93
68	94
69	96
70	97
71	98

n	a(n)
1	2
2	3
3	6
4	7
5	8
6	10
7	12
8	13
9	14
10	15
11	17
12	18
13	21
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	32
22	33
23	34
24	35
25	37
26	38
27	39
28	40
29	42
30	43
31	46
32	47
33	48
34	50
35	51
36	52
37	53
38	54
39	56
40	57
41	58
42	60
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	72
52	73
53	74
54	75
55	77
56	78
57	82
58	83
59	84
60	85
61	86
62	87
63	88
64	90
65	91
66	92
67	93
68	94
69	96
70	97
71	98

cp's OEIS Frontend

A232681 Numbers n such that the equation a^2 + 5*n*b^2 = 5*c^2 + n*d^2 has no solutions in positive integers for a, b, c, d.

Table of values

List of values

A232681 Numbers n such that the equation a^2 + 5nb^2 = 5c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

n	a(n)
1	2
2	3
3	6
4	7
5	8
6	10
7	12
8	13
9	14
10	15
11	17
12	18
13	21
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	32
22	33
23	34
24	35
25	37
26	38
27	39
28	40
29	42
30	43
31	46
32	47
33	48
34	50
35	51
36	52
37	53
38	54
39	56
40	57
41	58
42	60
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	72
52	73
53	74
54	75
55	77
56	78
57	82
58	83
59	84
60	85
61	86
62	87
63	88
64	90
65	91
66	92
67	93
68	94
69	96
70	97
71	98