A250623 - cp's OEIS frontend

A250623 a(n) = floor(nlog(prime(n))) + ceiling(nlog(n)) - 2*prime(n).

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

[-4, -2, -2, -1, -2, 0, -1, 2, 2, -1, 2, -1, 0, 3, 4, 2, 0, 4, 1, 3, 8, 7, 8, 6, 1, 2, 8, 10, 16, 18, 3, 5, 4, 9, 2, 8, 7, 6, 8, 8, 7, 13, 5, 12, 15, 22, 10, -1, 2, 9, 13, 12, 19, 12, 12, 12, 11, 18, 18, 22, 29, 22, 8, 12, 19, 23, 8, 8, 2, 9, 13, 13, 11, 11, 11]

cp's OEIS Frontend

A250623 a(n) = floor(nlog(prime(n))) + ceiling(nlog(n)) - 2*prime(n).

Table of values

List of values

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

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

cp's OEIS Frontend

A250623 a(n) = floor(n*log(prime(n))) + ceiling(n*log(n)) - 2*prime(n).

Table of values

List of values

A250623 a(n) = floor(nlog(prime(n))) + ceiling(nlog(n)) - 2*prime(n).

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