A384693 - cp's OEIS frontend

A384693 a(n) is the number of lattice points (r,s) such that 0 and ((r^2+s^2)d - rd^2)/r is a square for some integer d with 0

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	3
6	3
7	3
8	5
9	7
10	9
11	9
12	13
13	14
14	16
15	21
16	26
17	27
18	29
19	29
20	33
21	35
22	37
23	37
24	42
25	48
26	52
27	56
28	62
29	63
30	70
31	70
32	76
33	77
34	81
35	83
36	94
37	95
38	95
39	98
40	108
41	109
42	113
43	113
44	118
45	125
46	127
47	127
48	140
49	146
50	156
51	160
52	167
53	168
54	174
55	180
56	187
57	188
58	191
59	191
60	206
61	207
62	208
63	216
64	228
65	234
66	239
67	239
68	247
69	249
70	258
71	258
72	275
73	276
74	280
75	292

[0, 0, 0, 0, 2, 3, 3, 3, 5, 7, 9, 9, 13, 14, 16, 21, 26, 27, 29, 29, 33, 35, 37, 37, 42, 48, 52, 56, 62, 63, 70, 70, 76, 77, 81, 83, 94, 95, 95, 98, 108, 109, 113, 113, 118, 125, 127, 127, 140, 146, 156, 160, 167, 168, 174, 180, 187, 188, 191, 191, 206, 207, 208, 216, 228, 234, 239, 239, 247, 249, 258, 258, 275, 276, 280, 292]

cp's OEIS Frontend

A384693 a(n) is the number of lattice points (r,s) such that 0 and ((r^2+s^2)d - rd^2)/r is a square for some integer d with 0

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	3
6	3
7	3
8	5
9	7
10	9
11	9
12	13
13	14
14	16
15	21
16	26
17	27
18	29
19	29
20	33
21	35
22	37
23	37
24	42
25	48
26	52
27	56
28	62
29	63
30	70
31	70
32	76
33	77
34	81
35	83
36	94
37	95
38	95
39	98
40	108
41	109
42	113
43	113
44	118
45	125
46	127
47	127
48	140
49	146
50	156
51	160
52	167
53	168
54	174
55	180
56	187
57	188
58	191
59	191
60	206
61	207
62	208
63	216
64	228
65	234
66	239
67	239
68	247
69	249
70	258
71	258
72	275
73	276
74	280
75	292

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	3
6	3
7	3
8	5
9	7
10	9
11	9
12	13
13	14
14	16
15	21
16	26
17	27
18	29
19	29
20	33
21	35
22	37
23	37
24	42
25	48
26	52
27	56
28	62
29	63
30	70
31	70
32	76
33	77
34	81
35	83
36	94
37	95
38	95
39	98
40	108
41	109
42	113
43	113
44	118
45	125
46	127
47	127
48	140
49	146
50	156
51	160
52	167
53	168
54	174
55	180
56	187
57	188
58	191
59	191
60	206
61	207
62	208
63	216
64	228
65	234
66	239
67	239
68	247
69	249
70	258
71	258
72	275
73	276
74	280
75	292

cp's OEIS Frontend

A384693 a(n) is the number of lattice points (r,s) such that 0 and ((r^2+s^2)*d - r*d^2)/r is a square for some integer d with 0

Table of values

List of values

A384693 a(n) is the number of lattice points (r,s) such that 0 and ((r^2+s^2)d - rd^2)/r is a square for some integer d with 0

n	a(n)
0	0
1	0
2	0
3	0
4	2
5	3
6	3
7	3
8	5
9	7
10	9
11	9
12	13
13	14
14	16
15	21
16	26
17	27
18	29
19	29
20	33
21	35
22	37
23	37
24	42
25	48
26	52
27	56
28	62
29	63
30	70
31	70
32	76
33	77
34	81
35	83
36	94
37	95
38	95
39	98
40	108
41	109
42	113
43	113
44	118
45	125
46	127
47	127
48	140
49	146
50	156
51	160
52	167
53	168
54	174
55	180
56	187
57	188
58	191
59	191
60	206
61	207
62	208
63	216
64	228
65	234
66	239
67	239
68	247
69	249
70	258
71	258
72	275
73	276
74	280
75	292