A115879 - cp's OEIS frontend

A115879 a(n) is the least positive x 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	2
4	0
5	6
6	4
7	12
8	3
9	6
10	12
11	30
12	8
13	42
14	24
15	4
16	6
17	72
18	12
19	90
20	24
21	10
22	60
23	132
24	5
25	30
26	84
27	18
28	48
29	210
30	8
31	240
32	12
33	22
34	144
35	6
36	24
37	342
38	180
39	26
40	15
41	420
42	20
43	462
44	120
45	12
46	264
47	552
48	7
49	84
50	60
51	34
52	168
53	702
54	36
55	24
56	21
57	38
58	420
59	870
60	16
61	930
62	480
63	8
64	24
65	36
66	44

[0, 0, 2, 0, 6, 4, 12, 3, 6, 12, 30, 8, 42, 24, 4, 6, 72, 12, 90, 24, 10, 60, 132, 5, 30, 84, 18, 48, 210, 8, 240, 12, 22, 144, 6, 24, 342, 180, 26, 15, 420, 20, 462, 120, 12, 264, 552, 7, 84, 60, 34, 168, 702, 36, 24, 21, 38, 420, 870, 16, 930, 480, 8, 24, 36, 44]

cp's OEIS Frontend

A115879 a(n) is the least positive x 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	2
4	0
5	6
6	4
7	12
8	3
9	6
10	12
11	30
12	8
13	42
14	24
15	4
16	6
17	72
18	12
19	90
20	24
21	10
22	60
23	132
24	5
25	30
26	84
27	18
28	48
29	210
30	8
31	240
32	12
33	22
34	144
35	6
36	24
37	342
38	180
39	26
40	15
41	420
42	20
43	462
44	120
45	12
46	264
47	552
48	7
49	84
50	60
51	34
52	168
53	702
54	36
55	24
56	21
57	38
58	420
59	870
60	16
61	930
62	480
63	8
64	24
65	36
66	44

n	a(n)
1	0
2	0
3	2
4	0
5	6
6	4
7	12
8	3
9	6
10	12
11	30
12	8
13	42
14	24
15	4
16	6
17	72
18	12
19	90
20	24
21	10
22	60
23	132
24	5
25	30
26	84
27	18
28	48
29	210
30	8
31	240
32	12
33	22
34	144
35	6
36	24
37	342
38	180
39	26
40	15
41	420
42	20
43	462
44	120
45	12
46	264
47	552
48	7
49	84
50	60
51	34
52	168
53	702
54	36
55	24
56	21
57	38
58	420
59	870
60	16
61	930
62	480
63	8
64	24
65	36
66	44

n	a(n)
1	0
2	0
3	2
4	0
5	6
6	4
7	12
8	3
9	6
10	12
11	30
12	8
13	42
14	24
15	4
16	6
17	72
18	12
19	90
20	24
21	10
22	60
23	132
24	5
25	30
26	84
27	18
28	48
29	210
30	8
31	240
32	12
33	22
34	144
35	6
36	24
37	342
38	180
39	26
40	15
41	420
42	20
43	462
44	120
45	12
46	264
47	552
48	7
49	84
50	60
51	34
52	168
53	702
54	36
55	24
56	21
57	38
58	420
59	870
60	16
61	930
62	480
63	8
64	24
65	36
66	44