A241884 - cp's OEIS frontend

A241884 Numbers n such that n - n^2/k^2 is not prime for all k < n.

n	a(n)
1	1
2	2
3	5
4	7
5	9
6	10
7	11
8	13
9	15
10	16
11	17
12	19
13	21
14	22
15	23
16	25
17	26
18	27
19	28
20	29
21	31
22	33
23	34
24	35
25	36
26	37
27	39
28	40
29	41
30	43
31	45
32	46
33	47
34	49
35	50
36	51
37	52
38	53
39	55
40	57
41	58
42	59
43	61
44	63
45	64
46	65
47	66
48	67
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	81
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	91
67	92
68	93
69	94
70	95
71	96
72	97
73	99
74	100

[1, 2, 5, 7, 9, 10, 11, 13, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 28, 29, 31, 33, 34, 35, 36, 37, 39, 40, 41, 43, 45, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 63, 64, 65, 66, 67, 69, 70, 71, 73, 75, 76, 77, 78, 79, 81, 82, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 99, 100]

cp's OEIS Frontend

A241884 Numbers n such that n - n^2/k^2 is not prime for all k < n.

Table of values

List of values

n	a(n)
1	1
2	2
3	5
4	7
5	9
6	10
7	11
8	13
9	15
10	16
11	17
12	19
13	21
14	22
15	23
16	25
17	26
18	27
19	28
20	29
21	31
22	33
23	34
24	35
25	36
26	37
27	39
28	40
29	41
30	43
31	45
32	46
33	47
34	49
35	50
36	51
37	52
38	53
39	55
40	57
41	58
42	59
43	61
44	63
45	64
46	65
47	66
48	67
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	81
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	91
67	92
68	93
69	94
70	95
71	96
72	97
73	99
74	100

n	a(n)
1	1
2	2
3	5
4	7
5	9
6	10
7	11
8	13
9	15
10	16
11	17
12	19
13	21
14	22
15	23
16	25
17	26
18	27
19	28
20	29
21	31
22	33
23	34
24	35
25	36
26	37
27	39
28	40
29	41
30	43
31	45
32	46
33	47
34	49
35	50
36	51
37	52
38	53
39	55
40	57
41	58
42	59
43	61
44	63
45	64
46	65
47	66
48	67
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	81
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	91
67	92
68	93
69	94
70	95
71	96
72	97
73	99
74	100

n	a(n)
1	1
2	2
3	5
4	7
5	9
6	10
7	11
8	13
9	15
10	16
11	17
12	19
13	21
14	22
15	23
16	25
17	26
18	27
19	28
20	29
21	31
22	33
23	34
24	35
25	36
26	37
27	39
28	40
29	41
30	43
31	45
32	46
33	47
34	49
35	50
36	51
37	52
38	53
39	55
40	57
41	58
42	59
43	61
44	63
45	64
46	65
47	66
48	67
49	69
50	70
51	71
52	73
53	75
54	76
55	77
56	78
57	79
58	81
59	82
60	83
61	85
62	86
63	87
64	88
65	89
66	91
67	92
68	93
69	94
70	95
71	96
72	97
73	99
74	100