A379979 - cp's OEIS frontend

A379979 Number of pairs (m,k), 1 <= m < k <= N such that there exists 1 <= x < y < k-1 such that 1/x^2 - 1/y^2 = 1/m^2 - 1/k^2, N = A355812(n).

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	10
7	12
8	14
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	30
18	32
19	34
20	36
21	38
22	40
23	42
24	44
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	60
33	62
34	64
35	65
36	67
37	69
38	71
39	75
40	76
41	78
42	82
43	84
44	86
45	89
46	91
47	93
48	95
49	97
50	99
51	101
52	105
53	108
54	110
55	112
56	116
57	118
58	119
59	121
60	123
61	129
62	131
63	133
64	137
65	139

[1, 3, 5, 7, 8, 10, 12, 14, 16, 17, 19, 21, 23, 25, 27, 28, 30, 32, 34, 36, 38, 40, 42, 44, 45, 47, 49, 51, 53, 55, 57, 60, 62, 64, 65, 67, 69, 71, 75, 76, 78, 82, 84, 86, 89, 91, 93, 95, 97, 99, 101, 105, 108, 110, 112, 116, 118, 119, 121, 123, 129, 131, 133, 137, 139]

cp's OEIS Frontend

A379979 Number of pairs (m,k), 1 <= m < k <= N such that there exists 1 <= x < y < k-1 such that 1/x^2 - 1/y^2 = 1/m^2 - 1/k^2, N = A355812(n).

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	10
7	12
8	14
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	30
18	32
19	34
20	36
21	38
22	40
23	42
24	44
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	60
33	62
34	64
35	65
36	67
37	69
38	71
39	75
40	76
41	78
42	82
43	84
44	86
45	89
46	91
47	93
48	95
49	97
50	99
51	101
52	105
53	108
54	110
55	112
56	116
57	118
58	119
59	121
60	123
61	129
62	131
63	133
64	137
65	139

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	10
7	12
8	14
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	30
18	32
19	34
20	36
21	38
22	40
23	42
24	44
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	60
33	62
34	64
35	65
36	67
37	69
38	71
39	75
40	76
41	78
42	82
43	84
44	86
45	89
46	91
47	93
48	95
49	97
50	99
51	101
52	105
53	108
54	110
55	112
56	116
57	118
58	119
59	121
60	123
61	129
62	131
63	133
64	137
65	139

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	10
7	12
8	14
9	16
10	17
11	19
12	21
13	23
14	25
15	27
16	28
17	30
18	32
19	34
20	36
21	38
22	40
23	42
24	44
25	45
26	47
27	49
28	51
29	53
30	55
31	57
32	60
33	62
34	64
35	65
36	67
37	69
38	71
39	75
40	76
41	78
42	82
43	84
44	86
45	89
46	91
47	93
48	95
49	97
50	99
51	101
52	105
53	108
54	110
55	112
56	116
57	118
58	119
59	121
60	123
61	129
62	131
63	133
64	137
65	139