A094708 - cp's OEIS frontend

A094708 Size of the smallest set hitting all {x, 2x, 3x} contained in D(n) = the first n 3-smooth numbers {1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27,...} (A003586).

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	2
10	3
11	3
12	4
13	4
14	4
15	4
16	5
17	5
18	5
19	6
20	6
21	7
22	7
23	7
24	7
25	8
26	8
27	9
28	9
29	9
30	9
31	10
32	10
33	11
34	11
35	11
36	11
37	12
38	12
39	13
40	13
41	13
42	13
43	13
44	14
45	14
46	15
47	15
48	15
49	16
50	16
51	16
52	17
53	17
54	18
55	18
56	18
57	18
58	19
59	19
60	19
61	19
62	20
63	21

[0, 0, 1, 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 8, 9, 9, 9, 9, 10, 10, 11, 11, 11, 11, 12, 12, 13, 13, 13, 13, 13, 14, 14, 15, 15, 15, 16, 16, 16, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 21]

cp's OEIS Frontend

A094708 Size of the smallest set hitting all {x, 2x, 3x} contained in D(n) = the first n 3-smooth numbers {1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27,...} (A003586).

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	2
10	3
11	3
12	4
13	4
14	4
15	4
16	5
17	5
18	5
19	6
20	6
21	7
22	7
23	7
24	7
25	8
26	8
27	9
28	9
29	9
30	9
31	10
32	10
33	11
34	11
35	11
36	11
37	12
38	12
39	13
40	13
41	13
42	13
43	13
44	14
45	14
46	15
47	15
48	15
49	16
50	16
51	16
52	17
53	17
54	18
55	18
56	18
57	18
58	19
59	19
60	19
61	19
62	20
63	21

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	2
10	3
11	3
12	4
13	4
14	4
15	4
16	5
17	5
18	5
19	6
20	6
21	7
22	7
23	7
24	7
25	8
26	8
27	9
28	9
29	9
30	9
31	10
32	10
33	11
34	11
35	11
36	11
37	12
38	12
39	13
40	13
41	13
42	13
43	13
44	14
45	14
46	15
47	15
48	15
49	16
50	16
51	16
52	17
53	17
54	18
55	18
56	18
57	18
58	19
59	19
60	19
61	19
62	20
63	21

n	a(n)
1	0
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	2
10	3
11	3
12	4
13	4
14	4
15	4
16	5
17	5
18	5
19	6
20	6
21	7
22	7
23	7
24	7
25	8
26	8
27	9
28	9
29	9
30	9
31	10
32	10
33	11
34	11
35	11
36	11
37	12
38	12
39	13
40	13
41	13
42	13
43	13
44	14
45	14
46	15
47	15
48	15
49	16
50	16
51	16
52	17
53	17
54	18
55	18
56	18
57	18
58	19
59	19
60	19
61	19
62	20
63	21