A196778 - cp's OEIS frontend

A196778 a(n) is the number of primes in the form of 4^n+/-4^k+/-1, while 0 <= k < n.

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

[1, 3, 5, 6, 7, 7, 9, 8, 9, 12, 7, 9, 4, 4, 8, 11, 6, 11, 7, 8, 14, 7, 8, 11, 6, 10, 9, 8, 8, 11, 6, 10, 13, 7, 6, 9, 10, 8, 8, 10, 5, 10, 15, 6, 11, 9, 14, 7, 8, 16, 12, 10, 5, 10, 9, 8, 10, 8, 7, 10, 11, 13, 12, 6, 12, 9, 4, 10, 12, 13, 8, 14, 7, 2, 13, 7]

cp's OEIS Frontend

A196778 a(n) is the number of primes in the form of 4^n+/-4^k+/-1, while 0 <= k < n.

Table of values

List of values

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

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

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