A369862 - cp's OEIS frontend

A369862 a(n) is the smallest error in trying to solve n^2 = x^2 + y^2: given n >= 2, find positive integers x <= y < n such that |n^2 - x^2 - y^2| is minimal and let a(n) = n^2 - x^2 - y^2. In case of a tie, choose the value with the smallest y.

n	a(n)
2	2
3	1
4	-2
5	0
6	2
7	-1
8	-1
9	1
10	0
11	-4
12	-1
13	0
14	2
15	0
16	-4
17	0
18	-1
19	1
20	0
21	-1
22	-1
23	-1
24	-2
25	0
26	0
27	-1
28	-1
29	0
30	0
31	-1
32	-1
33	1
34	0
35	0
36	-4
37	0
38	-1
39	0
40	0
41	0
42	-1
43	-1
44	-1
45	0
46	-1
47	-1
48	-1
49	-3
50	0
51	0
52	0
53	0
54	-4
55	0
56	3
57	-1
58	0
59	-4
60	0
61	0
62	-1
63	-1
64	-1
65	0
66	4
67	-1
68	0
69	-4
70	0
71	-3
72	-1
73	0
74	0
75	0
76	-1
77	-1
78	0
79	-4
80	0
81	1
82	0
83	-1
84	-2
85	0
86	-1
87	0
88	-1
89	0
90	0
91	0
92	-1
93	-1
94	3
95	0
96	-1
97	0
98	-1
99	1

[2, 1, -2, 0, 2, -1, -1, 1, 0, -4, -1, 0, 2, 0, -4, 0, -1, 1, 0, -1, -1, -1, -2, 0, 0, -1, -1, 0, 0, -1, -1, 1, 0, 0, -4, 0, -1, 0, 0, 0, -1, -1, -1, 0, -1, -1, -1, -3, 0, 0, 0, 0, -4, 0, 3, -1, 0, -4, 0, 0, -1, -1, -1, 0, 4, -1, 0, -4, 0, -3, -1, 0, 0, 0, -1, -1, 0, -4, 0, 1, 0, -1, -2, 0, -1, 0, -1, 0, 0, 0, -1, -1, 3, 0, -1, 0, -1, 1]

cp's OEIS Frontend

A369862 a(n) is the smallest error in trying to solve n^2 = x^2 + y^2: given n >= 2, find positive integers x <= y < n such that |n^2 - x^2 - y^2| is minimal and let a(n) = n^2 - x^2 - y^2. In case of a tie, choose the value with the smallest y.

Table of values

List of values

n	a(n)
2	2
3	1
4	-2
5	0
6	2
7	-1
8	-1
9	1
10	0
11	-4
12	-1
13	0
14	2
15	0
16	-4
17	0
18	-1
19	1
20	0
21	-1
22	-1
23	-1
24	-2
25	0
26	0
27	-1
28	-1
29	0
30	0
31	-1
32	-1
33	1
34	0
35	0
36	-4
37	0
38	-1
39	0
40	0
41	0
42	-1
43	-1
44	-1
45	0
46	-1
47	-1
48	-1
49	-3
50	0
51	0
52	0
53	0
54	-4
55	0
56	3
57	-1
58	0
59	-4
60	0
61	0
62	-1
63	-1
64	-1
65	0
66	4
67	-1
68	0
69	-4
70	0
71	-3
72	-1
73	0
74	0
75	0
76	-1
77	-1
78	0
79	-4
80	0
81	1
82	0
83	-1
84	-2
85	0
86	-1
87	0
88	-1
89	0
90	0
91	0
92	-1
93	-1
94	3
95	0
96	-1
97	0
98	-1
99	1

n	a(n)
2	2
3	1
4	-2
5	0
6	2
7	-1
8	-1
9	1
10	0
11	-4
12	-1
13	0
14	2
15	0
16	-4
17	0
18	-1
19	1
20	0
21	-1
22	-1
23	-1
24	-2
25	0
26	0
27	-1
28	-1
29	0
30	0
31	-1
32	-1
33	1
34	0
35	0
36	-4
37	0
38	-1
39	0
40	0
41	0
42	-1
43	-1
44	-1
45	0
46	-1
47	-1
48	-1
49	-3
50	0
51	0
52	0
53	0
54	-4
55	0
56	3
57	-1
58	0
59	-4
60	0
61	0
62	-1
63	-1
64	-1
65	0
66	4
67	-1
68	0
69	-4
70	0
71	-3
72	-1
73	0
74	0
75	0
76	-1
77	-1
78	0
79	-4
80	0
81	1
82	0
83	-1
84	-2
85	0
86	-1
87	0
88	-1
89	0
90	0
91	0
92	-1
93	-1
94	3
95	0
96	-1
97	0
98	-1
99	1

n	a(n)
2	2
3	1
4	-2
5	0
6	2
7	-1
8	-1
9	1
10	0
11	-4
12	-1
13	0
14	2
15	0
16	-4
17	0
18	-1
19	1
20	0
21	-1
22	-1
23	-1
24	-2
25	0
26	0
27	-1
28	-1
29	0
30	0
31	-1
32	-1
33	1
34	0
35	0
36	-4
37	0
38	-1
39	0
40	0
41	0
42	-1
43	-1
44	-1
45	0
46	-1
47	-1
48	-1
49	-3
50	0
51	0
52	0
53	0
54	-4
55	0
56	3
57	-1
58	0
59	-4
60	0
61	0
62	-1
63	-1
64	-1
65	0
66	4
67	-1
68	0
69	-4
70	0
71	-3
72	-1
73	0
74	0
75	0
76	-1
77	-1
78	0
79	-4
80	0
81	1
82	0
83	-1
84	-2
85	0
86	-1
87	0
88	-1
89	0
90	0
91	0
92	-1
93	-1
94	3
95	0
96	-1
97	0
98	-1
99	1