A066680 - cp's OEIS frontend

A066680 Badly sieved numbers: as in the Sieve of Eratosthenes multiples of unmarked numbers p are marked, but only up to p^2.

n	a(n)
1	2
2	3
3	5
4	7
5	8
6	11
7	12
8	13
9	17
10	18
11	19
12	23
13	27
14	29
15	30
16	31
17	37
18	41
19	43
20	45
21	47
22	50
23	53
24	59
25	61
26	63
27	67
28	70
29	71
30	73
31	75
32	79
33	80
34	83
35	89
36	97
37	98
38	101
39	103
40	105
41	107
42	109
43	112
44	113
45	125
46	127
47	128
48	131
49	137
50	139
51	147
52	149
53	151
54	154
55	157
56	163

[2, 3, 5, 7, 8, 11, 12, 13, 17, 18, 19, 23, 27, 29, 30, 31, 37, 41, 43, 45, 47, 50, 53, 59, 61, 63, 67, 70, 71, 73, 75, 79, 80, 83, 89, 97, 98, 101, 103, 105, 107, 109, 112, 113, 125, 127, 128, 131, 137, 139, 147, 149, 151, 154, 157, 163]

cp's OEIS Frontend

A066680 Badly sieved numbers: as in the Sieve of Eratosthenes multiples of unmarked numbers p are marked, but only up to p^2.

Table of values

List of values

n	a(n)
1	2
2	3
3	5
4	7
5	8
6	11
7	12
8	13
9	17
10	18
11	19
12	23
13	27
14	29
15	30
16	31
17	37
18	41
19	43
20	45
21	47
22	50
23	53
24	59
25	61
26	63
27	67
28	70
29	71
30	73
31	75
32	79
33	80
34	83
35	89
36	97
37	98
38	101
39	103
40	105
41	107
42	109
43	112
44	113
45	125
46	127
47	128
48	131
49	137
50	139
51	147
52	149
53	151
54	154
55	157
56	163

n	a(n)
1	2
2	3
3	5
4	7
5	8
6	11
7	12
8	13
9	17
10	18
11	19
12	23
13	27
14	29
15	30
16	31
17	37
18	41
19	43
20	45
21	47
22	50
23	53
24	59
25	61
26	63
27	67
28	70
29	71
30	73
31	75
32	79
33	80
34	83
35	89
36	97
37	98
38	101
39	103
40	105
41	107
42	109
43	112
44	113
45	125
46	127
47	128
48	131
49	137
50	139
51	147
52	149
53	151
54	154
55	157
56	163

n	a(n)
1	2
2	3
3	5
4	7
5	8
6	11
7	12
8	13
9	17
10	18
11	19
12	23
13	27
14	29
15	30
16	31
17	37
18	41
19	43
20	45
21	47
22	50
23	53
24	59
25	61
26	63
27	67
28	70
29	71
30	73
31	75
32	79
33	80
34	83
35	89
36	97
37	98
38	101
39	103
40	105
41	107
42	109
43	112
44	113
45	125
46	127
47	128
48	131
49	137
50	139
51	147
52	149
53	151
54	154
55	157
56	163