A214728 - cp's OEIS frontend

A214728 Least k such that n + (n+1) + ... + (n+k-1) is a square.

n	a(n)
0	1
1	1
2	3
3	5
4	1
5	9
6	11
7	13
8	15
9	1
10	19
11	3
12	2
13	25
14	27
15	29
16	1
17	33
18	5
19	37
20	39
21	8
22	43
23	45
24	2
25	1
26	3
27	53
28	55
29	57
30	59
31	61
32	9
33	65
34	67
35	6
36	1
37	8
38	75
39	11
40	2
41	81
42	83
43	5
44	87
45	9
46	13
47	3
48	95
49	1
50	99
51	101
52	18
53	15
54	107
55	109
56	111
57	8
58	10
59	117
60	2
61	121
62	24
63	125
64	1
65	129
66	131
67	19
68	135
69	25
70	139
71	6

[1, 1, 3, 5, 1, 9, 11, 13, 15, 1, 19, 3, 2, 25, 27, 29, 1, 33, 5, 37, 39, 8, 43, 45, 2, 1, 3, 53, 55, 57, 59, 61, 9, 65, 67, 6, 1, 8, 75, 11, 2, 81, 83, 5, 87, 9, 13, 3, 95, 1, 99, 101, 18, 15, 107, 109, 111, 8, 10, 117, 2, 121, 24, 125, 1, 129, 131, 19, 135, 25, 139, 6]

cp's OEIS Frontend

A214728 Least k such that n + (n+1) + ... + (n+k-1) is a square.

Table of values

List of values

n	a(n)
0	1
1	1
2	3
3	5
4	1
5	9
6	11
7	13
8	15
9	1
10	19
11	3
12	2
13	25
14	27
15	29
16	1
17	33
18	5
19	37
20	39
21	8
22	43
23	45
24	2
25	1
26	3
27	53
28	55
29	57
30	59
31	61
32	9
33	65
34	67
35	6
36	1
37	8
38	75
39	11
40	2
41	81
42	83
43	5
44	87
45	9
46	13
47	3
48	95
49	1
50	99
51	101
52	18
53	15
54	107
55	109
56	111
57	8
58	10
59	117
60	2
61	121
62	24
63	125
64	1
65	129
66	131
67	19
68	135
69	25
70	139
71	6

n	a(n)
0	1
1	1
2	3
3	5
4	1
5	9
6	11
7	13
8	15
9	1
10	19
11	3
12	2
13	25
14	27
15	29
16	1
17	33
18	5
19	37
20	39
21	8
22	43
23	45
24	2
25	1
26	3
27	53
28	55
29	57
30	59
31	61
32	9
33	65
34	67
35	6
36	1
37	8
38	75
39	11
40	2
41	81
42	83
43	5
44	87
45	9
46	13
47	3
48	95
49	1
50	99
51	101
52	18
53	15
54	107
55	109
56	111
57	8
58	10
59	117
60	2
61	121
62	24
63	125
64	1
65	129
66	131
67	19
68	135
69	25
70	139
71	6

n	a(n)
0	1
1	1
2	3
3	5
4	1
5	9
6	11
7	13
8	15
9	1
10	19
11	3
12	2
13	25
14	27
15	29
16	1
17	33
18	5
19	37
20	39
21	8
22	43
23	45
24	2
25	1
26	3
27	53
28	55
29	57
30	59
31	61
32	9
33	65
34	67
35	6
36	1
37	8
38	75
39	11
40	2
41	81
42	83
43	5
44	87
45	9
46	13
47	3
48	95
49	1
50	99
51	101
52	18
53	15
54	107
55	109
56	111
57	8
58	10
59	117
60	2
61	121
62	24
63	125
64	1
65	129
66	131
67	19
68	135
69	25
70	139
71	6