A333839 - cp's OEIS frontend

A333839 a(n) = Sum_{k = 4..n} ((prevprime(k) + nextprime(k))/2 - k).

n	a(n)
4	0
5	0
6	0
7	1
8	2
9	2
10	1
11	0
12	0
13	1
14	2
15	2
16	1
17	0
18	0
19	1
20	2
21	2
22	1
23	2
24	4
25	5
26	5
27	4
28	2
29	0
30	0
31	2
32	4
33	5
34	5
35	4
36	2
37	1
38	2
39	2
40	1
41	0
42	0
43	1
44	2
45	2
46	1
47	2
48	4
49	5
50	5
51	4
52	2
53	2
54	4
55	5
56	5
57	4
58	2
59	0
60	0
61	2
62	4
63	5
64	5
65	4
66	2
67	1
68	2
69	2
70	1
71	0
72	0
73	2
74	4
75	5
76	5
77	4
78	2
79	1
80	2
81	2
82	1
83	2
84	4
85	5
86	5
87	4
88	2
89	3
90	6
91	8
92	9
93	9
94	8
95	6

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

cp's OEIS Frontend

A333839 a(n) = Sum_{k = 4..n} ((prevprime(k) + nextprime(k))/2 - k).

Table of values

List of values

n	a(n)
4	0
5	0
6	0
7	1
8	2
9	2
10	1
11	0
12	0
13	1
14	2
15	2
16	1
17	0
18	0
19	1
20	2
21	2
22	1
23	2
24	4
25	5
26	5
27	4
28	2
29	0
30	0
31	2
32	4
33	5
34	5
35	4
36	2
37	1
38	2
39	2
40	1
41	0
42	0
43	1
44	2
45	2
46	1
47	2
48	4
49	5
50	5
51	4
52	2
53	2
54	4
55	5
56	5
57	4
58	2
59	0
60	0
61	2
62	4
63	5
64	5
65	4
66	2
67	1
68	2
69	2
70	1
71	0
72	0
73	2
74	4
75	5
76	5
77	4
78	2
79	1
80	2
81	2
82	1
83	2
84	4
85	5
86	5
87	4
88	2
89	3
90	6
91	8
92	9
93	9
94	8
95	6

n	a(n)
4	0
5	0
6	0
7	1
8	2
9	2
10	1
11	0
12	0
13	1
14	2
15	2
16	1
17	0
18	0
19	1
20	2
21	2
22	1
23	2
24	4
25	5
26	5
27	4
28	2
29	0
30	0
31	2
32	4
33	5
34	5
35	4
36	2
37	1
38	2
39	2
40	1
41	0
42	0
43	1
44	2
45	2
46	1
47	2
48	4
49	5
50	5
51	4
52	2
53	2
54	4
55	5
56	5
57	4
58	2
59	0
60	0
61	2
62	4
63	5
64	5
65	4
66	2
67	1
68	2
69	2
70	1
71	0
72	0
73	2
74	4
75	5
76	5
77	4
78	2
79	1
80	2
81	2
82	1
83	2
84	4
85	5
86	5
87	4
88	2
89	3
90	6
91	8
92	9
93	9
94	8
95	6

n	a(n)
4	0
5	0
6	0
7	1
8	2
9	2
10	1
11	0
12	0
13	1
14	2
15	2
16	1
17	0
18	0
19	1
20	2
21	2
22	1
23	2
24	4
25	5
26	5
27	4
28	2
29	0
30	0
31	2
32	4
33	5
34	5
35	4
36	2
37	1
38	2
39	2
40	1
41	0
42	0
43	1
44	2
45	2
46	1
47	2
48	4
49	5
50	5
51	4
52	2
53	2
54	4
55	5
56	5
57	4
58	2
59	0
60	0
61	2
62	4
63	5
64	5
65	4
66	2
67	1
68	2
69	2
70	1
71	0
72	0
73	2
74	4
75	5
76	5
77	4
78	2
79	1
80	2
81	2
82	1
83	2
84	4
85	5
86	5
87	4
88	2
89	3
90	6
91	8
92	9
93	9
94	8
95	6