A278603 - cp's OEIS frontend

A278603 A prime mountain: peaks and valleys beyond the origin correspond to prime abscissa (see Comments for precise definition).

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

[0, 1, 2, 1, 2, 3, 2, 1, 2, 3, 4, 5, 4, 3, 4, 5, 6, 7, 6, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 4, 5, 4, 3, 2, 1, 0, -1, 0, 1, 2, 3, 2, 1, 2, 3, 4, 5, 4, 3, 2, 1, 0, -1, 0, 1, 2, 3, 4, 5, 4, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 6, 7, 6, 5, 4, 3, 2, 1, 2, 3, 4, 5, 4, 3]

cp's OEIS Frontend

A278603 A prime mountain: peaks and valleys beyond the origin correspond to prime abscissa (see Comments for precise definition).

Table of values

List of values

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

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

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