A289279 - cp's OEIS frontend

A289279 Number of odd composite numbers in ]2(n-1)^2, 2n^2[.

n	a(n)
1	0
2	0
3	2
4	3
5	5
6	6
7	8
8	9
9	11
10	10
11	14
12	15
13	18
14	18
15	19
16	21
17	24
18	23
19	27
20	28
21	28
22	32
23	31
24	34
25	35
26	38
27	39
28	39
29	41
30	44
31	46
32	47
33	48
34	49
35	50
36	57
37	51
38	56
39	59
40	63
41	59
42	65
43	61
44	67
45	67
46	69
47	73
48	72
49	73
50	77
51	78
52	82
53	80
54	80
55	85
56	84
57	87
58	90
59	90
60	94
61	98
62	90
63	97
64	102
65	100

[0, 0, 2, 3, 5, 6, 8, 9, 11, 10, 14, 15, 18, 18, 19, 21, 24, 23, 27, 28, 28, 32, 31, 34, 35, 38, 39, 39, 41, 44, 46, 47, 48, 49, 50, 57, 51, 56, 59, 63, 59, 65, 61, 67, 67, 69, 73, 72, 73, 77, 78, 82, 80, 80, 85, 84, 87, 90, 90, 94, 98, 90, 97, 102, 100]

cp's OEIS Frontend

A289279 Number of odd composite numbers in ]2(n-1)^2, 2n^2[.

Table of values

List of values

n	a(n)
1	0
2	0
3	2
4	3
5	5
6	6
7	8
8	9
9	11
10	10
11	14
12	15
13	18
14	18
15	19
16	21
17	24
18	23
19	27
20	28
21	28
22	32
23	31
24	34
25	35
26	38
27	39
28	39
29	41
30	44
31	46
32	47
33	48
34	49
35	50
36	57
37	51
38	56
39	59
40	63
41	59
42	65
43	61
44	67
45	67
46	69
47	73
48	72
49	73
50	77
51	78
52	82
53	80
54	80
55	85
56	84
57	87
58	90
59	90
60	94
61	98
62	90
63	97
64	102
65	100

n	a(n)
1	0
2	0
3	2
4	3
5	5
6	6
7	8
8	9
9	11
10	10
11	14
12	15
13	18
14	18
15	19
16	21
17	24
18	23
19	27
20	28
21	28
22	32
23	31
24	34
25	35
26	38
27	39
28	39
29	41
30	44
31	46
32	47
33	48
34	49
35	50
36	57
37	51
38	56
39	59
40	63
41	59
42	65
43	61
44	67
45	67
46	69
47	73
48	72
49	73
50	77
51	78
52	82
53	80
54	80
55	85
56	84
57	87
58	90
59	90
60	94
61	98
62	90
63	97
64	102
65	100

cp's OEIS Frontend

A289279 Number of odd composite numbers in ]2*(n-1)^2, 2*n^2[.

Table of values

List of values

A289279 Number of odd composite numbers in ]2(n-1)^2, 2n^2[.

n	a(n)
1	0
2	0
3	2
4	3
5	5
6	6
7	8
8	9
9	11
10	10
11	14
12	15
13	18
14	18
15	19
16	21
17	24
18	23
19	27
20	28
21	28
22	32
23	31
24	34
25	35
26	38
27	39
28	39
29	41
30	44
31	46
32	47
33	48
34	49
35	50
36	57
37	51
38	56
39	59
40	63
41	59
42	65
43	61
44	67
45	67
46	69
47	73
48	72
49	73
50	77
51	78
52	82
53	80
54	80
55	85
56	84
57	87
58	90
59	90
60	94
61	98
62	90
63	97
64	102
65	100