A362376 - cp's OEIS frontend

A362376 a(n) is the least k such that Fibonacci(n)*Fibonacci(k) + 1 is a prime, and -1 if no such k exists.

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	3
7	9
8	3
9	4
10	9
11	3
12	4
13	3
14	27
15	4
16	24
17	24
18	4
19	3
20	6
21	3
22	3
23	444
24	3
25	12
26	9
27	3
28	63
29	6
30	8
31	36
32	6
33	36
34	12
35	12
36	4
37	21
38	60
39	4
40	3
41	24
42	73
43	51
44	3
45	11
46	51
47	12
48	4
49	504
50	12
51	3
52	33
53	21
54	6
55	9
56	6
57	4
58	384
59	21
60	7
61	54
62	3
63	4
64	51
65	24
66	63
67	30
68	24
69	11
70	45
71	72
72	6
73	39
74	9
75	22
76	42
77	12
78	16
79	60
80	30

[1, 1, 1, 3, 3, 3, 9, 3, 4, 9, 3, 4, 3, 27, 4, 24, 24, 4, 3, 6, 3, 3, 444, 3, 12, 9, 3, 63, 6, 8, 36, 6, 36, 12, 12, 4, 21, 60, 4, 3, 24, 73, 51, 3, 11, 51, 12, 4, 504, 12, 3, 33, 21, 6, 9, 6, 4, 384, 21, 7, 54, 3, 4, 51, 24, 63, 30, 24, 11, 45, 72, 6, 39, 9, 22, 42, 12, 16, 60, 30]

cp's OEIS Frontend

A362376 a(n) is the least k such that Fibonacci(n)*Fibonacci(k) + 1 is a prime, and -1 if no such k exists.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	3
7	9
8	3
9	4
10	9
11	3
12	4
13	3
14	27
15	4
16	24
17	24
18	4
19	3
20	6
21	3
22	3
23	444
24	3
25	12
26	9
27	3
28	63
29	6
30	8
31	36
32	6
33	36
34	12
35	12
36	4
37	21
38	60
39	4
40	3
41	24
42	73
43	51
44	3
45	11
46	51
47	12
48	4
49	504
50	12
51	3
52	33
53	21
54	6
55	9
56	6
57	4
58	384
59	21
60	7
61	54
62	3
63	4
64	51
65	24
66	63
67	30
68	24
69	11
70	45
71	72
72	6
73	39
74	9
75	22
76	42
77	12
78	16
79	60
80	30

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	3
7	9
8	3
9	4
10	9
11	3
12	4
13	3
14	27
15	4
16	24
17	24
18	4
19	3
20	6
21	3
22	3
23	444
24	3
25	12
26	9
27	3
28	63
29	6
30	8
31	36
32	6
33	36
34	12
35	12
36	4
37	21
38	60
39	4
40	3
41	24
42	73
43	51
44	3
45	11
46	51
47	12
48	4
49	504
50	12
51	3
52	33
53	21
54	6
55	9
56	6
57	4
58	384
59	21
60	7
61	54
62	3
63	4
64	51
65	24
66	63
67	30
68	24
69	11
70	45
71	72
72	6
73	39
74	9
75	22
76	42
77	12
78	16
79	60
80	30

n	a(n)
1	1
2	1
3	1
4	3
5	3
6	3
7	9
8	3
9	4
10	9
11	3
12	4
13	3
14	27
15	4
16	24
17	24
18	4
19	3
20	6
21	3
22	3
23	444
24	3
25	12
26	9
27	3
28	63
29	6
30	8
31	36
32	6
33	36
34	12
35	12
36	4
37	21
38	60
39	4
40	3
41	24
42	73
43	51
44	3
45	11
46	51
47	12
48	4
49	504
50	12
51	3
52	33
53	21
54	6
55	9
56	6
57	4
58	384
59	21
60	7
61	54
62	3
63	4
64	51
65	24
66	63
67	30
68	24
69	11
70	45
71	72
72	6
73	39
74	9
75	22
76	42
77	12
78	16
79	60
80	30