A046460 - cp's OEIS frontend

A046460 Number of prime factors of concatenation of numbers from 1 up to n, with multiplicity.

n	a(n)
1	0
2	3
3	2
4	2
5	3
6	8
7	2
8	5
9	4
10	3
11	6
12	6
13	3
14	3
15	3
16	4
17	5
18	6
19	6
20	10
21	8
22	6
23	4
24	6
25	5
26	9
27	8
28	7
29	4
30	7
31	3
32	6
33	6
34	2
35	8
36	9
37	4
38	4
39	6
40	9
41	5
42	7
43	4
44	7
45	10
46	7
47	5
48	8
49	6
50	10
51	3
52	9
53	8
54	14
55	5
56	5
57	6
58	4
59	4
60	8
61	3
62	8
63	5
64	10
65	6
66	8
67	3
68	10
69	7
70	6
71	6
72	7
73	3
74	9
75	6
76	6
77	5
78	6
79	6
80	10
81	6
82	7
83	6
84	7
85	6

[0, 3, 2, 2, 3, 8, 2, 5, 4, 3, 6, 6, 3, 3, 3, 4, 5, 6, 6, 10, 8, 6, 4, 6, 5, 9, 8, 7, 4, 7, 3, 6, 6, 2, 8, 9, 4, 4, 6, 9, 5, 7, 4, 7, 10, 7, 5, 8, 6, 10, 3, 9, 8, 14, 5, 5, 6, 4, 4, 8, 3, 8, 5, 10, 6, 8, 3, 10, 7, 6, 6, 7, 3, 9, 6, 6, 5, 6, 6, 10, 6, 7, 6, 7, 6]

cp's OEIS Frontend

A046460 Number of prime factors of concatenation of numbers from 1 up to n, with multiplicity.

Table of values

List of values

n	a(n)
1	0
2	3
3	2
4	2
5	3
6	8
7	2
8	5
9	4
10	3
11	6
12	6
13	3
14	3
15	3
16	4
17	5
18	6
19	6
20	10
21	8
22	6
23	4
24	6
25	5
26	9
27	8
28	7
29	4
30	7
31	3
32	6
33	6
34	2
35	8
36	9
37	4
38	4
39	6
40	9
41	5
42	7
43	4
44	7
45	10
46	7
47	5
48	8
49	6
50	10
51	3
52	9
53	8
54	14
55	5
56	5
57	6
58	4
59	4
60	8
61	3
62	8
63	5
64	10
65	6
66	8
67	3
68	10
69	7
70	6
71	6
72	7
73	3
74	9
75	6
76	6
77	5
78	6
79	6
80	10
81	6
82	7
83	6
84	7
85	6

n	a(n)
1	0
2	3
3	2
4	2
5	3
6	8
7	2
8	5
9	4
10	3
11	6
12	6
13	3
14	3
15	3
16	4
17	5
18	6
19	6
20	10
21	8
22	6
23	4
24	6
25	5
26	9
27	8
28	7
29	4
30	7
31	3
32	6
33	6
34	2
35	8
36	9
37	4
38	4
39	6
40	9
41	5
42	7
43	4
44	7
45	10
46	7
47	5
48	8
49	6
50	10
51	3
52	9
53	8
54	14
55	5
56	5
57	6
58	4
59	4
60	8
61	3
62	8
63	5
64	10
65	6
66	8
67	3
68	10
69	7
70	6
71	6
72	7
73	3
74	9
75	6
76	6
77	5
78	6
79	6
80	10
81	6
82	7
83	6
84	7
85	6

n	a(n)
1	0
2	3
3	2
4	2
5	3
6	8
7	2
8	5
9	4
10	3
11	6
12	6
13	3
14	3
15	3
16	4
17	5
18	6
19	6
20	10
21	8
22	6
23	4
24	6
25	5
26	9
27	8
28	7
29	4
30	7
31	3
32	6
33	6
34	2
35	8
36	9
37	4
38	4
39	6
40	9
41	5
42	7
43	4
44	7
45	10
46	7
47	5
48	8
49	6
50	10
51	3
52	9
53	8
54	14
55	5
56	5
57	6
58	4
59	4
60	8
61	3
62	8
63	5
64	10
65	6
66	8
67	3
68	10
69	7
70	6
71	6
72	7
73	3
74	9
75	6
76	6
77	5
78	6
79	6
80	10
81	6
82	7
83	6
84	7
85	6