A156706 - cp's OEIS frontend

A156706 For all numbers k(n) congruent to +1 or -1 (mod 6) starting with k(n) = {5,7,11,13,...}, a(k(n)) is the congruence (mod 6) if k(n) is prime and 0 if k(n) is composite.

n	a(n)
1	-1
2	1
3	-1
4	1
5	-1
6	1
7	-1
8	0
9	-1
10	1
11	0
12	1
13	-1
14	1
15	-1
16	0
17	-1
18	0
19	-1
20	1
21	0
22	1
23	-1
24	1
25	0
26	1
27	-1
28	0
29	-1
30	0
31	0
32	1
33	-1
34	1
35	-1
36	1
37	-1
38	0
39	0
40	0
41	0
42	1
43	-1
44	0
45	-1
46	1
47	0
48	0
49	-1
50	1
51	0
52	1
53	0
54	1
55	-1
56	0
57	-1
58	0
59	-1
60	1
61	0
62	0
63	-1
64	1
65	-1
66	1
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	1
75	-1
76	1
77	-1
78	0
79	-1
80	1
81	0
82	0
83	-1
84	0
85	-1
86	0
87	-1
88	0
89	-1
90	1
91	0

[-1, 1, -1, 1, -1, 1, -1, 0, -1, 1, 0, 1, -1, 1, -1, 0, -1, 0, -1, 1, 0, 1, -1, 1, 0, 1, -1, 0, -1, 0, 0, 1, -1, 1, -1, 1, -1, 0, 0, 0, 0, 1, -1, 0, -1, 1, 0, 0, -1, 1, 0, 1, 0, 1, -1, 0, -1, 0, -1, 1, 0, 0, -1, 1, -1, 1, 0, 0, 0, 1, 0, 0, 0, 1, -1, 1, -1, 0, -1, 1, 0, 0, -1, 0, -1, 0, -1, 0, -1, 1, 0]

cp's OEIS Frontend

A156706 For all numbers k(n) congruent to +1 or -1 (mod 6) starting with k(n) = {5,7,11,13,...}, a(k(n)) is the congruence (mod 6) if k(n) is prime and 0 if k(n) is composite.

Table of values

List of values

n	a(n)
1	-1
2	1
3	-1
4	1
5	-1
6	1
7	-1
8	0
9	-1
10	1
11	0
12	1
13	-1
14	1
15	-1
16	0
17	-1
18	0
19	-1
20	1
21	0
22	1
23	-1
24	1
25	0
26	1
27	-1
28	0
29	-1
30	0
31	0
32	1
33	-1
34	1
35	-1
36	1
37	-1
38	0
39	0
40	0
41	0
42	1
43	-1
44	0
45	-1
46	1
47	0
48	0
49	-1
50	1
51	0
52	1
53	0
54	1
55	-1
56	0
57	-1
58	0
59	-1
60	1
61	0
62	0
63	-1
64	1
65	-1
66	1
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	1
75	-1
76	1
77	-1
78	0
79	-1
80	1
81	0
82	0
83	-1
84	0
85	-1
86	0
87	-1
88	0
89	-1
90	1
91	0

n	a(n)
1	-1
2	1
3	-1
4	1
5	-1
6	1
7	-1
8	0
9	-1
10	1
11	0
12	1
13	-1
14	1
15	-1
16	0
17	-1
18	0
19	-1
20	1
21	0
22	1
23	-1
24	1
25	0
26	1
27	-1
28	0
29	-1
30	0
31	0
32	1
33	-1
34	1
35	-1
36	1
37	-1
38	0
39	0
40	0
41	0
42	1
43	-1
44	0
45	-1
46	1
47	0
48	0
49	-1
50	1
51	0
52	1
53	0
54	1
55	-1
56	0
57	-1
58	0
59	-1
60	1
61	0
62	0
63	-1
64	1
65	-1
66	1
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	1
75	-1
76	1
77	-1
78	0
79	-1
80	1
81	0
82	0
83	-1
84	0
85	-1
86	0
87	-1
88	0
89	-1
90	1
91	0

n	a(n)
1	-1
2	1
3	-1
4	1
5	-1
6	1
7	-1
8	0
9	-1
10	1
11	0
12	1
13	-1
14	1
15	-1
16	0
17	-1
18	0
19	-1
20	1
21	0
22	1
23	-1
24	1
25	0
26	1
27	-1
28	0
29	-1
30	0
31	0
32	1
33	-1
34	1
35	-1
36	1
37	-1
38	0
39	0
40	0
41	0
42	1
43	-1
44	0
45	-1
46	1
47	0
48	0
49	-1
50	1
51	0
52	1
53	0
54	1
55	-1
56	0
57	-1
58	0
59	-1
60	1
61	0
62	0
63	-1
64	1
65	-1
66	1
67	0
68	0
69	0
70	1
71	0
72	0
73	0
74	1
75	-1
76	1
77	-1
78	0
79	-1
80	1
81	0
82	0
83	-1
84	0
85	-1
86	0
87	-1
88	0
89	-1
90	1
91	0