A251726 - cp's OEIS frontend

A251726 Numbers n > 1 for which gpf(n) < lpf(n)^2, where lpf and gpf (least and greatest prime factor of n) are given by A020639(n) and A006530(n).

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	15
13	16
14	17
15	18
16	19
17	21
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	35
26	36
27	37
28	41
29	43
30	45
31	47
32	48
33	49
34	53
35	54
36	55
37	59
38	61
39	63
40	64
41	65
42	67
43	71
44	72
45	73
46	75
47	77
48	79
49	81
50	83
51	85
52	89
53	91
54	95
55	96
56	97
57	101
58	103
59	105
60	107
61	108
62	109
63	113
64	115
65	119
66	121
67	125
68	127
69	128
70	131
71	133
72	135
73	137
74	139
75	143
76	144

[2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 17, 18, 19, 21, 23, 24, 25, 27, 29, 31, 32, 35, 36, 37, 41, 43, 45, 47, 48, 49, 53, 54, 55, 59, 61, 63, 64, 65, 67, 71, 72, 73, 75, 77, 79, 81, 83, 85, 89, 91, 95, 96, 97, 101, 103, 105, 107, 108, 109, 113, 115, 119, 121, 125, 127, 128, 131, 133, 135, 137, 139, 143, 144]

cp's OEIS Frontend

A251726 Numbers n > 1 for which gpf(n) < lpf(n)^2, where lpf and gpf (least and greatest prime factor of n) are given by A020639(n) and A006530(n).

Table of values

List of values

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	15
13	16
14	17
15	18
16	19
17	21
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	35
26	36
27	37
28	41
29	43
30	45
31	47
32	48
33	49
34	53
35	54
36	55
37	59
38	61
39	63
40	64
41	65
42	67
43	71
44	72
45	73
46	75
47	77
48	79
49	81
50	83
51	85
52	89
53	91
54	95
55	96
56	97
57	101
58	103
59	105
60	107
61	108
62	109
63	113
64	115
65	119
66	121
67	125
68	127
69	128
70	131
71	133
72	135
73	137
74	139
75	143
76	144

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	15
13	16
14	17
15	18
16	19
17	21
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	35
26	36
27	37
28	41
29	43
30	45
31	47
32	48
33	49
34	53
35	54
36	55
37	59
38	61
39	63
40	64
41	65
42	67
43	71
44	72
45	73
46	75
47	77
48	79
49	81
50	83
51	85
52	89
53	91
54	95
55	96
56	97
57	101
58	103
59	105
60	107
61	108
62	109
63	113
64	115
65	119
66	121
67	125
68	127
69	128
70	131
71	133
72	135
73	137
74	139
75	143
76	144

n	a(n)
1	2
2	3
3	4
4	5
5	6
6	7
7	8
8	9
9	11
10	12
11	13
12	15
13	16
14	17
15	18
16	19
17	21
18	23
19	24
20	25
21	27
22	29
23	31
24	32
25	35
26	36
27	37
28	41
29	43
30	45
31	47
32	48
33	49
34	53
35	54
36	55
37	59
38	61
39	63
40	64
41	65
42	67
43	71
44	72
45	73
46	75
47	77
48	79
49	81
50	83
51	85
52	89
53	91
54	95
55	96
56	97
57	101
58	103
59	105
60	107
61	108
62	109
63	113
64	115
65	119
66	121
67	125
68	127
69	128
70	131
71	133
72	135
73	137
74	139
75	143
76	144