A185011 - cp's OEIS frontend

A185011 Numbers k such that P(k^2+1) < P((k+1)^2+1) where P(n) (A006530) is the largest prime factor of n.

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	9
7	13
8	15
9	18
10	19
11	21
12	23
13	25
14	27
15	28
16	31
17	32
18	34
19	35
20	38
21	39
22	41
23	43
24	44
25	47
26	48
27	50
28	53
29	55
30	57
31	58
32	60
33	64
34	65
35	68
36	70
37	73
38	75
39	76
40	77
41	78
42	80
43	81
44	83
45	86
46	87
47	89
48	91
49	93
50	96
51	99
52	100
53	105
54	107
55	109
56	111
57	112
58	114
59	115
60	117
61	119
62	123
63	125

[1, 3, 5, 7, 8, 9, 13, 15, 18, 19, 21, 23, 25, 27, 28, 31, 32, 34, 35, 38, 39, 41, 43, 44, 47, 48, 50, 53, 55, 57, 58, 60, 64, 65, 68, 70, 73, 75, 76, 77, 78, 80, 81, 83, 86, 87, 89, 91, 93, 96, 99, 100, 105, 107, 109, 111, 112, 114, 115, 117, 119, 123, 125]

cp's OEIS Frontend

A185011 Numbers k such that P(k^2+1) < P((k+1)^2+1) where P(n) (A006530) is the largest prime factor of n.

Table of values

List of values

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	9
7	13
8	15
9	18
10	19
11	21
12	23
13	25
14	27
15	28
16	31
17	32
18	34
19	35
20	38
21	39
22	41
23	43
24	44
25	47
26	48
27	50
28	53
29	55
30	57
31	58
32	60
33	64
34	65
35	68
36	70
37	73
38	75
39	76
40	77
41	78
42	80
43	81
44	83
45	86
46	87
47	89
48	91
49	93
50	96
51	99
52	100
53	105
54	107
55	109
56	111
57	112
58	114
59	115
60	117
61	119
62	123
63	125

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	9
7	13
8	15
9	18
10	19
11	21
12	23
13	25
14	27
15	28
16	31
17	32
18	34
19	35
20	38
21	39
22	41
23	43
24	44
25	47
26	48
27	50
28	53
29	55
30	57
31	58
32	60
33	64
34	65
35	68
36	70
37	73
38	75
39	76
40	77
41	78
42	80
43	81
44	83
45	86
46	87
47	89
48	91
49	93
50	96
51	99
52	100
53	105
54	107
55	109
56	111
57	112
58	114
59	115
60	117
61	119
62	123
63	125

n	a(n)
1	1
2	3
3	5
4	7
5	8
6	9
7	13
8	15
9	18
10	19
11	21
12	23
13	25
14	27
15	28
16	31
17	32
18	34
19	35
20	38
21	39
22	41
23	43
24	44
25	47
26	48
27	50
28	53
29	55
30	57
31	58
32	60
33	64
34	65
35	68
36	70
37	73
38	75
39	76
40	77
41	78
42	80
43	81
44	83
45	86
46	87
47	89
48	91
49	93
50	96
51	99
52	100
53	105
54	107
55	109
56	111
57	112
58	114
59	115
60	117
61	119
62	123
63	125