A172038 - cp's OEIS frontend

A172038 Smallest nonnegative integer such that n + (a(n))^2 is a perfect square, or -1 if no such integer exists.

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

[0, -1, 1, 0, 2, -1, 3, 1, 0, -1, 5, 2, 6, -1, 1, 0, 8, -1, 9, 4, 2, -1, 11, 1, 0, -1, 3, 6, 14, -1, 15, 2, 4, -1, 1, 0, 18, -1, 5, 3, 20, -1, 21, 10, 2, -1, 23, 1, 0, -1, 7, 12, 26, -1, 3, 5, 8, -1, 29, 2, 30, -1, 1, 0, 4, -1, 33, 16, 10, -1, 35, 3, 36, -1, 5, 18, 2, -1, 39, 1, 0, -1, 41, 4, 6]

cp's OEIS Frontend

A172038 Smallest nonnegative integer such that n + (a(n))^2 is a perfect square, or -1 if no such integer exists.

Table of values

List of values

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

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

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