A063539 - cp's OEIS frontend

A063539 Numbers n that are sqrt(n-1)-smooth: largest prime factor of n (=A006530(n)) < sqrt(n).

n	a(n)
1	1
2	8
3	12
4	16
5	18
6	24
7	27
8	30
9	32
10	36
11	40
12	45
13	48
14	50
15	54
16	56
17	60
18	63
19	64
20	70
21	72
22	75
23	80
24	81
25	84
26	90
27	96
28	98
29	100
30	105
31	108
32	112
33	120
34	125
35	126
36	128
37	132
38	135
39	140
40	144
41	147
42	150
43	154
44	160
45	162
46	165
47	168
48	175
49	176
50	180
51	182
52	189
53	192
54	195
55	196

[1, 8, 12, 16, 18, 24, 27, 30, 32, 36, 40, 45, 48, 50, 54, 56, 60, 63, 64, 70, 72, 75, 80, 81, 84, 90, 96, 98, 100, 105, 108, 112, 120, 125, 126, 128, 132, 135, 140, 144, 147, 150, 154, 160, 162, 165, 168, 175, 176, 180, 182, 189, 192, 195, 196]

cp's OEIS Frontend

A063539 Numbers n that are sqrt(n-1)-smooth: largest prime factor of n (=A006530(n)) < sqrt(n).

Table of values

List of values

n	a(n)
1	1
2	8
3	12
4	16
5	18
6	24
7	27
8	30
9	32
10	36
11	40
12	45
13	48
14	50
15	54
16	56
17	60
18	63
19	64
20	70
21	72
22	75
23	80
24	81
25	84
26	90
27	96
28	98
29	100
30	105
31	108
32	112
33	120
34	125
35	126
36	128
37	132
38	135
39	140
40	144
41	147
42	150
43	154
44	160
45	162
46	165
47	168
48	175
49	176
50	180
51	182
52	189
53	192
54	195
55	196

n	a(n)
1	1
2	8
3	12
4	16
5	18
6	24
7	27
8	30
9	32
10	36
11	40
12	45
13	48
14	50
15	54
16	56
17	60
18	63
19	64
20	70
21	72
22	75
23	80
24	81
25	84
26	90
27	96
28	98
29	100
30	105
31	108
32	112
33	120
34	125
35	126
36	128
37	132
38	135
39	140
40	144
41	147
42	150
43	154
44	160
45	162
46	165
47	168
48	175
49	176
50	180
51	182
52	189
53	192
54	195
55	196

n	a(n)
1	1
2	8
3	12
4	16
5	18
6	24
7	27
8	30
9	32
10	36
11	40
12	45
13	48
14	50
15	54
16	56
17	60
18	63
19	64
20	70
21	72
22	75
23	80
24	81
25	84
26	90
27	96
28	98
29	100
30	105
31	108
32	112
33	120
34	125
35	126
36	128
37	132
38	135
39	140
40	144
41	147
42	150
43	154
44	160
45	162
46	165
47	168
48	175
49	176
50	180
51	182
52	189
53	192
54	195
55	196