A365811 - cp's OEIS frontend

A365811 Numbers k >= 0 such that Mordell's equation y^2 = k^3 + x*(x + 1)/2 has an integral solution for a pair (x >= 0, y >= 0).

n	a(n)
1	0
2	1
3	2
4	4
5	9
6	11
7	12
8	14
9	16
10	25
11	26
12	35
13	36
14	38
15	40
16	45
17	49
18	57
19	62
20	64
21	69
22	71
23	74
24	81
25	84
26	85
27	88
28	95
29	96
30	97
31	100
32	107
33	109
34	117
35	120
36	121
37	122
38	134
39	136
40	144
41	145
42	146
43	155
44	156
45	157
46	169
47	170
48	172
49	179
50	180
51	191
52	196
53	201
54	213
55	217
56	225
57	230
58	240
59	242
60	244

[0, 1, 2, 4, 9, 11, 12, 14, 16, 25, 26, 35, 36, 38, 40, 45, 49, 57, 62, 64, 69, 71, 74, 81, 84, 85, 88, 95, 96, 97, 100, 107, 109, 117, 120, 121, 122, 134, 136, 144, 145, 146, 155, 156, 157, 169, 170, 172, 179, 180, 191, 196, 201, 213, 217, 225, 230, 240, 242, 244]

cp's OEIS Frontend

A365811 Numbers k >= 0 such that Mordell's equation y^2 = k^3 + x*(x + 1)/2 has an integral solution for a pair (x >= 0, y >= 0).

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	4
5	9
6	11
7	12
8	14
9	16
10	25
11	26
12	35
13	36
14	38
15	40
16	45
17	49
18	57
19	62
20	64
21	69
22	71
23	74
24	81
25	84
26	85
27	88
28	95
29	96
30	97
31	100
32	107
33	109
34	117
35	120
36	121
37	122
38	134
39	136
40	144
41	145
42	146
43	155
44	156
45	157
46	169
47	170
48	172
49	179
50	180
51	191
52	196
53	201
54	213
55	217
56	225
57	230
58	240
59	242
60	244

n	a(n)
1	0
2	1
3	2
4	4
5	9
6	11
7	12
8	14
9	16
10	25
11	26
12	35
13	36
14	38
15	40
16	45
17	49
18	57
19	62
20	64
21	69
22	71
23	74
24	81
25	84
26	85
27	88
28	95
29	96
30	97
31	100
32	107
33	109
34	117
35	120
36	121
37	122
38	134
39	136
40	144
41	145
42	146
43	155
44	156
45	157
46	169
47	170
48	172
49	179
50	180
51	191
52	196
53	201
54	213
55	217
56	225
57	230
58	240
59	242
60	244

n	a(n)
1	0
2	1
3	2
4	4
5	9
6	11
7	12
8	14
9	16
10	25
11	26
12	35
13	36
14	38
15	40
16	45
17	49
18	57
19	62
20	64
21	69
22	71
23	74
24	81
25	84
26	85
27	88
28	95
29	96
30	97
31	100
32	107
33	109
34	117
35	120
36	121
37	122
38	134
39	136
40	144
41	145
42	146
43	155
44	156
45	157
46	169
47	170
48	172
49	179
50	180
51	191
52	196
53	201
54	213
55	217
56	225
57	230
58	240
59	242
60	244