A067722 - cp's OEIS frontend

A067722 Least positive integer k such that n*(n + k) is a perfect square.

n	a(n)
0	1
1	3
2	6
3	9
4	5
5	15
6	18
7	21
8	10
9	7
10	30
11	33
12	15
13	39
14	42
15	45
16	9
17	51
18	14
19	57
20	25
21	63
22	66
23	69
24	30
25	11
26	78
27	21
28	35
29	87
30	90
31	93
32	18
33	99
34	102
35	105
36	13
37	111
38	114
39	117
40	50
41	123
42	126
43	129
44	55
45	35
46	138
47	141
48	27
49	15
50	22
51	153
52	65
53	159
54	42
55	165
56	70
57	171
58	174
59	177
60	75
61	183
62	186
63	49
64	17

[1, 3, 6, 9, 5, 15, 18, 21, 10, 7, 30, 33, 15, 39, 42, 45, 9, 51, 14, 57, 25, 63, 66, 69, 30, 11, 78, 21, 35, 87, 90, 93, 18, 99, 102, 105, 13, 111, 114, 117, 50, 123, 126, 129, 55, 35, 138, 141, 27, 15, 22, 153, 65, 159, 42, 165, 70, 171, 174, 177, 75, 183, 186, 49, 17]

cp's OEIS Frontend

A067722 Least positive integer k such that n*(n + k) is a perfect square.

Table of values

List of values

n	a(n)
0	1
1	3
2	6
3	9
4	5
5	15
6	18
7	21
8	10
9	7
10	30
11	33
12	15
13	39
14	42
15	45
16	9
17	51
18	14
19	57
20	25
21	63
22	66
23	69
24	30
25	11
26	78
27	21
28	35
29	87
30	90
31	93
32	18
33	99
34	102
35	105
36	13
37	111
38	114
39	117
40	50
41	123
42	126
43	129
44	55
45	35
46	138
47	141
48	27
49	15
50	22
51	153
52	65
53	159
54	42
55	165
56	70
57	171
58	174
59	177
60	75
61	183
62	186
63	49
64	17

n	a(n)
0	1
1	3
2	6
3	9
4	5
5	15
6	18
7	21
8	10
9	7
10	30
11	33
12	15
13	39
14	42
15	45
16	9
17	51
18	14
19	57
20	25
21	63
22	66
23	69
24	30
25	11
26	78
27	21
28	35
29	87
30	90
31	93
32	18
33	99
34	102
35	105
36	13
37	111
38	114
39	117
40	50
41	123
42	126
43	129
44	55
45	35
46	138
47	141
48	27
49	15
50	22
51	153
52	65
53	159
54	42
55	165
56	70
57	171
58	174
59	177
60	75
61	183
62	186
63	49
64	17

n	a(n)
0	1
1	3
2	6
3	9
4	5
5	15
6	18
7	21
8	10
9	7
10	30
11	33
12	15
13	39
14	42
15	45
16	9
17	51
18	14
19	57
20	25
21	63
22	66
23	69
24	30
25	11
26	78
27	21
28	35
29	87
30	90
31	93
32	18
33	99
34	102
35	105
36	13
37	111
38	114
39	117
40	50
41	123
42	126
43	129
44	55
45	35
46	138
47	141
48	27
49	15
50	22
51	153
52	65
53	159
54	42
55	165
56	70
57	171
58	174
59	177
60	75
61	183
62	186
63	49
64	17