A253784 - cp's OEIS frontend

A253784 Numbers which have no two successive prime factors (when sorted into monotonic order) where the latter prime factor would be greater than the square of the former.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	23
20	24
21	25
22	27
23	29
24	30
25	31
26	32
27	35
28	36
29	37
30	41
31	42
32	43
33	45
34	47
35	48
36	49
37	53
38	54
39	55
40	59
41	60
42	61
43	63
44	64
45	65
46	67
47	71
48	72
49	73
50	75
51	77
52	79
53	81
54	83
55	84
56	85
57	89
58	90
59	91
60	95
61	96
62	97
63	101
64	103
65	105
66	107
67	108
68	109
69	113
70	115
71	119
72	120
73	121
74	125
75	126
76	127
77	128
78	131
79	133
80	135
81	137
82	139
83	143
84	144

[1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 17, 18, 19, 21, 23, 24, 25, 27, 29, 30, 31, 32, 35, 36, 37, 41, 42, 43, 45, 47, 48, 49, 53, 54, 55, 59, 60, 61, 63, 64, 65, 67, 71, 72, 73, 75, 77, 79, 81, 83, 84, 85, 89, 90, 91, 95, 96, 97, 101, 103, 105, 107, 108, 109, 113, 115, 119, 120, 121, 125, 126, 127, 128, 131, 133, 135, 137, 139, 143, 144]

cp's OEIS Frontend

A253784 Numbers which have no two successive prime factors (when sorted into monotonic order) where the latter prime factor would be greater than the square of the former.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	23
20	24
21	25
22	27
23	29
24	30
25	31
26	32
27	35
28	36
29	37
30	41
31	42
32	43
33	45
34	47
35	48
36	49
37	53
38	54
39	55
40	59
41	60
42	61
43	63
44	64
45	65
46	67
47	71
48	72
49	73
50	75
51	77
52	79
53	81
54	83
55	84
56	85
57	89
58	90
59	91
60	95
61	96
62	97
63	101
64	103
65	105
66	107
67	108
68	109
69	113
70	115
71	119
72	120
73	121
74	125
75	126
76	127
77	128
78	131
79	133
80	135
81	137
82	139
83	143
84	144

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	23
20	24
21	25
22	27
23	29
24	30
25	31
26	32
27	35
28	36
29	37
30	41
31	42
32	43
33	45
34	47
35	48
36	49
37	53
38	54
39	55
40	59
41	60
42	61
43	63
44	64
45	65
46	67
47	71
48	72
49	73
50	75
51	77
52	79
53	81
54	83
55	84
56	85
57	89
58	90
59	91
60	95
61	96
62	97
63	101
64	103
65	105
66	107
67	108
68	109
69	113
70	115
71	119
72	120
73	121
74	125
75	126
76	127
77	128
78	131
79	133
80	135
81	137
82	139
83	143
84	144

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	11
11	12
12	13
13	15
14	16
15	17
16	18
17	19
18	21
19	23
20	24
21	25
22	27
23	29
24	30
25	31
26	32
27	35
28	36
29	37
30	41
31	42
32	43
33	45
34	47
35	48
36	49
37	53
38	54
39	55
40	59
41	60
42	61
43	63
44	64
45	65
46	67
47	71
48	72
49	73
50	75
51	77
52	79
53	81
54	83
55	84
56	85
57	89
58	90
59	91
60	95
61	96
62	97
63	101
64	103
65	105
66	107
67	108
68	109
69	113
70	115
71	119
72	120
73	121
74	125
75	126
76	127
77	128
78	131
79	133
80	135
81	137
82	139
83	143
84	144