A273874 - cp's OEIS frontend

A273874 Least positive integer k such that k^2 + (k+1)^2 + ... + (k+n-2)^2 + (k+n-1)^2 is the sum of two nonzero squares. a(n) = 0 if no solution exists.

n	a(n)
1	5
2	1
3	2
4	0
5	2
6	0
7	0
8	0
9	0
10	2
11	5
12	1
13	12
14	0
15	3
16	0
17	3
18	0
19	0
20	0
21	0
22	0
23	53
24	1
25	1
26	1
27	2
28	0
29	4
30	0
31	0
32	0
33	5
34	2
35	0
36	0
37	2
38	0
39	3
40	0
41	5
42	0
43	0
44	5
45	0
46	0
47	73
48	1
49	3
50	1
51	2
52	0
53	2
54	0
55	5
56	0
57	0
58	2
59	97
60	1
61	4
62	0
63	0
64	0
65	2
66	5
67	0
68	0
69	30
70	0
71	0
72	0
73	1
74	1
75	4
76	0
77	0
78	0
79	0
80	0
81	0
82	2
83	26
84	0
85	6

[5, 1, 2, 0, 2, 0, 0, 0, 0, 2, 5, 1, 12, 0, 3, 0, 3, 0, 0, 0, 0, 0, 53, 1, 1, 1, 2, 0, 4, 0, 0, 0, 5, 2, 0, 0, 2, 0, 3, 0, 5, 0, 0, 5, 0, 0, 73, 1, 3, 1, 2, 0, 2, 0, 5, 0, 0, 2, 97, 1, 4, 0, 0, 0, 2, 5, 0, 0, 30, 0, 0, 0, 1, 1, 4, 0, 0, 0, 0, 0, 0, 2, 26, 0, 6]

cp's OEIS Frontend

A273874 Least positive integer k such that k^2 + (k+1)^2 + ... + (k+n-2)^2 + (k+n-1)^2 is the sum of two nonzero squares. a(n) = 0 if no solution exists.

Table of values

List of values

n	a(n)
1	5
2	1
3	2
4	0
5	2
6	0
7	0
8	0
9	0
10	2
11	5
12	1
13	12
14	0
15	3
16	0
17	3
18	0
19	0
20	0
21	0
22	0
23	53
24	1
25	1
26	1
27	2
28	0
29	4
30	0
31	0
32	0
33	5
34	2
35	0
36	0
37	2
38	0
39	3
40	0
41	5
42	0
43	0
44	5
45	0
46	0
47	73
48	1
49	3
50	1
51	2
52	0
53	2
54	0
55	5
56	0
57	0
58	2
59	97
60	1
61	4
62	0
63	0
64	0
65	2
66	5
67	0
68	0
69	30
70	0
71	0
72	0
73	1
74	1
75	4
76	0
77	0
78	0
79	0
80	0
81	0
82	2
83	26
84	0
85	6

n	a(n)
1	5
2	1
3	2
4	0
5	2
6	0
7	0
8	0
9	0
10	2
11	5
12	1
13	12
14	0
15	3
16	0
17	3
18	0
19	0
20	0
21	0
22	0
23	53
24	1
25	1
26	1
27	2
28	0
29	4
30	0
31	0
32	0
33	5
34	2
35	0
36	0
37	2
38	0
39	3
40	0
41	5
42	0
43	0
44	5
45	0
46	0
47	73
48	1
49	3
50	1
51	2
52	0
53	2
54	0
55	5
56	0
57	0
58	2
59	97
60	1
61	4
62	0
63	0
64	0
65	2
66	5
67	0
68	0
69	30
70	0
71	0
72	0
73	1
74	1
75	4
76	0
77	0
78	0
79	0
80	0
81	0
82	2
83	26
84	0
85	6

n	a(n)
1	5
2	1
3	2
4	0
5	2
6	0
7	0
8	0
9	0
10	2
11	5
12	1
13	12
14	0
15	3
16	0
17	3
18	0
19	0
20	0
21	0
22	0
23	53
24	1
25	1
26	1
27	2
28	0
29	4
30	0
31	0
32	0
33	5
34	2
35	0
36	0
37	2
38	0
39	3
40	0
41	5
42	0
43	0
44	5
45	0
46	0
47	73
48	1
49	3
50	1
51	2
52	0
53	2
54	0
55	5
56	0
57	0
58	2
59	97
60	1
61	4
62	0
63	0
64	0
65	2
66	5
67	0
68	0
69	30
70	0
71	0
72	0
73	1
74	1
75	4
76	0
77	0
78	0
79	0
80	0
81	0
82	2
83	26
84	0
85	6