A232682 - cp's OEIS frontend

A232682 Numbers n such that the equation a^2 + 7nb^2 = 7c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

n	a(n)
1	3
2	5
3	6
4	7
5	10
6	11
7	12
8	13
9	14
10	15
11	17
12	19
13	20
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	31
22	33
23	34
24	35
25	38
26	39
27	40
28	41
29	43
30	44
31	45
32	46
33	47
34	48
35	51
36	52
37	54
38	55
39	56
40	59
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	80
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	90
67	91
68	92
69	94
70	95
71	96
72	97
73	99

[3, 5, 6, 7, 10, 11, 12, 13, 14, 15, 17, 19, 20, 22, 23, 24, 26, 27, 28, 30, 31, 33, 34, 35, 38, 39, 40, 41, 43, 44, 45, 46, 47, 48, 51, 52, 54, 55, 56, 59, 60, 61, 62, 63, 65, 66, 67, 68, 69, 70, 71, 73, 75, 76, 77, 78, 79, 80, 82, 83, 85, 86, 87, 88, 89, 90, 91, 92, 94, 95, 96, 97, 99]

cp's OEIS Frontend

A232682 Numbers n such that the equation a^2 + 7nb^2 = 7c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

Table of values

List of values

n	a(n)
1	3
2	5
3	6
4	7
5	10
6	11
7	12
8	13
9	14
10	15
11	17
12	19
13	20
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	31
22	33
23	34
24	35
25	38
26	39
27	40
28	41
29	43
30	44
31	45
32	46
33	47
34	48
35	51
36	52
37	54
38	55
39	56
40	59
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	80
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	90
67	91
68	92
69	94
70	95
71	96
72	97
73	99

n	a(n)
1	3
2	5
3	6
4	7
5	10
6	11
7	12
8	13
9	14
10	15
11	17
12	19
13	20
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	31
22	33
23	34
24	35
25	38
26	39
27	40
28	41
29	43
30	44
31	45
32	46
33	47
34	48
35	51
36	52
37	54
38	55
39	56
40	59
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	80
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	90
67	91
68	92
69	94
70	95
71	96
72	97
73	99

cp's OEIS Frontend

A232682 Numbers n such that the equation a^2 + 7*n*b^2 = 7*c^2 + n*d^2 has no solutions in positive integers for a, b, c, d.

Table of values

List of values

A232682 Numbers n such that the equation a^2 + 7nb^2 = 7c^2 + nd^2 has no solutions in positive integers for a, b, c, d.

n	a(n)
1	3
2	5
3	6
4	7
5	10
6	11
7	12
8	13
9	14
10	15
11	17
12	19
13	20
14	22
15	23
16	24
17	26
18	27
19	28
20	30
21	31
22	33
23	34
24	35
25	38
26	39
27	40
28	41
29	43
30	44
31	45
32	46
33	47
34	48
35	51
36	52
37	54
38	55
39	56
40	59
41	60
42	61
43	62
44	63
45	65
46	66
47	67
48	68
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	80
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	90
67	91
68	92
69	94
70	95
71	96
72	97
73	99