A097330 - cp's OEIS frontend

A097330 In the sequence of prime numbers replace each term p with floor(p/2) and ceiling(p/2).

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

[1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 6, 7, 8, 9, 9, 10, 11, 12, 14, 15, 15, 16, 18, 19, 20, 21, 21, 22, 23, 24, 26, 27, 29, 30, 30, 31, 33, 34, 35, 36, 36, 37, 39, 40, 41, 42, 44, 45, 48, 49, 50, 51, 51, 52, 53, 54, 54, 55, 56, 57, 63, 64, 65, 66, 68, 69, 69, 70, 74, 75, 75, 76, 78, 79]

cp's OEIS Frontend

A097330 In the sequence of prime numbers replace each term p with floor(p/2) and ceiling(p/2).

Table of values

List of values

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

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

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