A196698 - cp's OEIS frontend

A196698 Number of primes of the form 3^n +- 3^k +- 1 with 0 <= k < n.

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

[2, 4, 6, 8, 7, 11, 7, 10, 11, 11, 8, 10, 9, 11, 14, 11, 10, 14, 7, 16, 12, 12, 7, 17, 10, 7, 15, 13, 4, 11, 11, 11, 13, 6, 12, 18, 9, 12, 17, 14, 13, 11, 10, 11, 13, 6, 7, 17, 9, 14, 9, 10, 13, 20, 8, 11, 10, 9, 8, 16, 12, 12, 13, 8, 12, 14, 8, 8, 10, 13, 9]

cp's OEIS Frontend

A196698 Number of primes of the form 3^n +- 3^k +- 1 with 0 <= k < n.

Table of values

List of values

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

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

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