A284346 - cp's OEIS frontend

A284346 a(n) is the least positive integer such that n^2 + a(n)^2 and (n + 1)^2 + (a(n) + 1)^2 are primes.

n	a(n)
1	2
2	1
3	8
4	1
5	4
6	1
7	2
8	3
9	16
10	3
11	6
12	7
13	8
14	1
15	4
16	1
17	22
18	5
19	6
20	3
21	4
22	17
23	18
24	5
25	4
26	1
27	32
28	5
29	10
30	29
31	4
32	27
33	8
34	15
35	18
36	1
37	2
38	15
39	10
40	3
41	4
42	247
43	8
44	15
45	14
46	19
47	22
48	35
49	6
50	19
51	4
52	27
53	10
54	11
55	8
56	1
57	2
58	5
59	40
60	13
61	44
62	127
63	58
64	61
65	28
66	1
67	22
68	13
69	10
70	19
71	6
72	7
73	8
74	15
75	4
76	9

[2, 1, 8, 1, 4, 1, 2, 3, 16, 3, 6, 7, 8, 1, 4, 1, 22, 5, 6, 3, 4, 17, 18, 5, 4, 1, 32, 5, 10, 29, 4, 27, 8, 15, 18, 1, 2, 15, 10, 3, 4, 247, 8, 15, 14, 19, 22, 35, 6, 19, 4, 27, 10, 11, 8, 1, 2, 5, 40, 13, 44, 127, 58, 61, 28, 1, 22, 13, 10, 19, 6, 7, 8, 15, 4, 9]

cp's OEIS Frontend

A284346 a(n) is the least positive integer such that n^2 + a(n)^2 and (n + 1)^2 + (a(n) + 1)^2 are primes.

Table of values

List of values

n	a(n)
1	2
2	1
3	8
4	1
5	4
6	1
7	2
8	3
9	16
10	3
11	6
12	7
13	8
14	1
15	4
16	1
17	22
18	5
19	6
20	3
21	4
22	17
23	18
24	5
25	4
26	1
27	32
28	5
29	10
30	29
31	4
32	27
33	8
34	15
35	18
36	1
37	2
38	15
39	10
40	3
41	4
42	247
43	8
44	15
45	14
46	19
47	22
48	35
49	6
50	19
51	4
52	27
53	10
54	11
55	8
56	1
57	2
58	5
59	40
60	13
61	44
62	127
63	58
64	61
65	28
66	1
67	22
68	13
69	10
70	19
71	6
72	7
73	8
74	15
75	4
76	9

n	a(n)
1	2
2	1
3	8
4	1
5	4
6	1
7	2
8	3
9	16
10	3
11	6
12	7
13	8
14	1
15	4
16	1
17	22
18	5
19	6
20	3
21	4
22	17
23	18
24	5
25	4
26	1
27	32
28	5
29	10
30	29
31	4
32	27
33	8
34	15
35	18
36	1
37	2
38	15
39	10
40	3
41	4
42	247
43	8
44	15
45	14
46	19
47	22
48	35
49	6
50	19
51	4
52	27
53	10
54	11
55	8
56	1
57	2
58	5
59	40
60	13
61	44
62	127
63	58
64	61
65	28
66	1
67	22
68	13
69	10
70	19
71	6
72	7
73	8
74	15
75	4
76	9

n	a(n)
1	2
2	1
3	8
4	1
5	4
6	1
7	2
8	3
9	16
10	3
11	6
12	7
13	8
14	1
15	4
16	1
17	22
18	5
19	6
20	3
21	4
22	17
23	18
24	5
25	4
26	1
27	32
28	5
29	10
30	29
31	4
32	27
33	8
34	15
35	18
36	1
37	2
38	15
39	10
40	3
41	4
42	247
43	8
44	15
45	14
46	19
47	22
48	35
49	6
50	19
51	4
52	27
53	10
54	11
55	8
56	1
57	2
58	5
59	40
60	13
61	44
62	127
63	58
64	61
65	28
66	1
67	22
68	13
69	10
70	19
71	6
72	7
73	8
74	15
75	4
76	9