A368647 - cp's OEIS frontend

A368647 The number of distinct primes of the form 3k+2 dividing n minus the number of distinct primes of the form 3k+1 dividing n.

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

[0, 1, 0, 1, 1, 1, -1, 1, 0, 2, 1, 1, -1, 0, 1, 1, 1, 1, -1, 2, -1, 2, 1, 1, 1, 0, 0, 0, 1, 2, -1, 1, 1, 2, 0, 1, -1, 0, -1, 2, 1, 0, -1, 2, 1, 2, 1, 1, -1, 2, 1, 0, 1, 1, 2, 0, -1, 2, 1, 2, -1, 0, -1, 1, 0, 2, -1, 2, 1, 1, 1, 1, -1, 0, 1, 0, 0, 0, -1, 2, 0, 2]

cp's OEIS Frontend

A368647 The number of distinct primes of the form 3k+2 dividing n minus the number of distinct primes of the form 3k+1 dividing n.

Table of values

List of values

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

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

cp's OEIS Frontend

A368647 The number of distinct primes of the form 3*k+2 dividing n minus the number of distinct primes of the form 3*k+1 dividing n.

Table of values

List of values

A368647 The number of distinct primes of the form 3k+2 dividing n minus the number of distinct primes of the form 3k+1 dividing n.

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