A076942 - cp's OEIS frontend

A076942 Smallest k > 0 such that n*k+1 is a square.

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

[3, 4, 1, 2, 3, 4, 5, 1, 7, 8, 9, 2, 11, 12, 1, 3, 15, 16, 17, 4, 3, 20, 21, 1, 23, 24, 25, 6, 27, 4, 29, 7, 3, 32, 1, 8, 35, 36, 5, 2, 39, 4, 41, 10, 8, 44, 45, 1, 47, 48, 5, 12, 51, 52, 8, 3, 7, 56, 57, 2, 59, 60, 1, 15, 3, 8, 65, 16, 7, 12, 69, 4, 71, 72, 9, 18, 15, 8, 77, 1, 79, 80, 81]

cp's OEIS Frontend

A076942 Smallest k > 0 such that n*k+1 is a square.

Table of values

List of values

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

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

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