A217254 - cp's OEIS frontend

A217254 a(n) = round(primepi(n) * prime(n)/n).

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

[0, 2, 3, 4, 7, 7, 10, 10, 10, 12, 14, 15, 19, 18, 19, 20, 24, 24, 28, 28, 28, 29, 32, 33, 35, 35, 34, 34, 38, 38, 45, 45, 46, 45, 47, 46, 51, 51, 51, 52, 57, 56, 62, 61, 61, 61, 67, 70, 69, 69, 69, 69, 73, 74, 75, 75, 76, 75, 80, 80, 84, 85, 88, 87, 87, 86, 94]

cp's OEIS Frontend

A217254 a(n) = round(primepi(n) * prime(n)/n).

Table of values

List of values

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

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

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