A115881 - cp's OEIS frontend

A115881 a(n) is the largest positive y satisfying the Diophantine equation x^2=y(y+n). a(n)=0 if there are no solutions.

n	a(n)
1	0
2	0
3	1
4	0
5	4
6	2
7	9
8	1
9	16
10	8
11	25
12	4
13	36
14	18
15	49
16	9
17	64
18	32
19	81
20	16
21	100
22	50
23	121
24	25
25	144
26	72
27	169
28	36
29	196
30	98
31	225
32	49
33	256
34	128
35	289
36	64
37	324
38	162
39	361
40	81
41	400
42	200
43	441
44	100
45	484
46	242
47	529
48	121
49	576
50	288
51	625
52	144
53	676
54	338
55	729
56	169
57	784
58	392
59	841
60	196

[0, 0, 1, 0, 4, 2, 9, 1, 16, 8, 25, 4, 36, 18, 49, 9, 64, 32, 81, 16, 100, 50, 121, 25, 144, 72, 169, 36, 196, 98, 225, 49, 256, 128, 289, 64, 324, 162, 361, 81, 400, 200, 441, 100, 484, 242, 529, 121, 576, 288, 625, 144, 676, 338, 729, 169, 784, 392, 841, 196]

cp's OEIS Frontend

A115881 a(n) is the largest positive y satisfying the Diophantine equation x^2=y(y+n). a(n)=0 if there are no solutions.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	4
6	2
7	9
8	1
9	16
10	8
11	25
12	4
13	36
14	18
15	49
16	9
17	64
18	32
19	81
20	16
21	100
22	50
23	121
24	25
25	144
26	72
27	169
28	36
29	196
30	98
31	225
32	49
33	256
34	128
35	289
36	64
37	324
38	162
39	361
40	81
41	400
42	200
43	441
44	100
45	484
46	242
47	529
48	121
49	576
50	288
51	625
52	144
53	676
54	338
55	729
56	169
57	784
58	392
59	841
60	196

n	a(n)
1	0
2	0
3	1
4	0
5	4
6	2
7	9
8	1
9	16
10	8
11	25
12	4
13	36
14	18
15	49
16	9
17	64
18	32
19	81
20	16
21	100
22	50
23	121
24	25
25	144
26	72
27	169
28	36
29	196
30	98
31	225
32	49
33	256
34	128
35	289
36	64
37	324
38	162
39	361
40	81
41	400
42	200
43	441
44	100
45	484
46	242
47	529
48	121
49	576
50	288
51	625
52	144
53	676
54	338
55	729
56	169
57	784
58	392
59	841
60	196

n	a(n)
1	0
2	0
3	1
4	0
5	4
6	2
7	9
8	1
9	16
10	8
11	25
12	4
13	36
14	18
15	49
16	9
17	64
18	32
19	81
20	16
21	100
22	50
23	121
24	25
25	144
26	72
27	169
28	36
29	196
30	98
31	225
32	49
33	256
34	128
35	289
36	64
37	324
38	162
39	361
40	81
41	400
42	200
43	441
44	100
45	484
46	242
47	529
48	121
49	576
50	288
51	625
52	144
53	676
54	338
55	729
56	169
57	784
58	392
59	841
60	196