A086565 - cp's OEIS frontend

A086565 Smallest k such that (10^k - 1)/9 has n distinct prime divisors. Or a(n)= smallest value of k such that A000042(k) has exactly n distinct prime divisors.

n	a(n)
0	1
1	2
2	3
3	9
4	8
5	6
6	15
7	12
8	18
9	45
10	24
11	32
12	54
13	30
14	42
15	64
16	102
17	72
18	108
19	154
20	60
21	84
22	96
23	140
24	126
25	200
26	120
27	204
28	308
29	168
30	192
31	280
32	180
33	210
34	240
35	252
36	330

[1, 2, 3, 9, 8, 6, 15, 12, 18, 45, 24, 32, 54, 30, 42, 64, 102, 72, 108, 154, 60, 84, 96, 140, 126, 200, 120, 204, 308, 168, 192, 280, 180, 210, 240, 252, 330]

cp's OEIS Frontend

A086565 Smallest k such that (10^k - 1)/9 has n distinct prime divisors. Or a(n)= smallest value of k such that A000042(k) has exactly n distinct prime divisors.

Table of values

List of values

n	a(n)
0	1
1	2
2	3
3	9
4	8
5	6
6	15
7	12
8	18
9	45
10	24
11	32
12	54
13	30
14	42
15	64
16	102
17	72
18	108
19	154
20	60
21	84
22	96
23	140
24	126
25	200
26	120
27	204
28	308
29	168
30	192
31	280
32	180
33	210
34	240
35	252
36	330

n	a(n)
0	1
1	2
2	3
3	9
4	8
5	6
6	15
7	12
8	18
9	45
10	24
11	32
12	54
13	30
14	42
15	64
16	102
17	72
18	108
19	154
20	60
21	84
22	96
23	140
24	126
25	200
26	120
27	204
28	308
29	168
30	192
31	280
32	180
33	210
34	240
35	252
36	330

n	a(n)
0	1
1	2
2	3
3	9
4	8
5	6
6	15
7	12
8	18
9	45
10	24
11	32
12	54
13	30
14	42
15	64
16	102
17	72
18	108
19	154
20	60
21	84
22	96
23	140
24	126
25	200
26	120
27	204
28	308
29	168
30	192
31	280
32	180
33	210
34	240
35	252
36	330