A078899 - cp's OEIS frontend

A078899 Number of times the greatest prime factor of n is the greatest prime factor for numbers <=n; a(1)=1.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	3
10	2
11	1
12	4
13	1
14	2
15	3
16	4
17	1
18	5
19	1
20	4
21	3
22	2
23	1
24	6
25	5
26	2
27	7
28	4
29	1
30	6
31	1
32	5
33	3
34	2
35	5
36	8
37	1
38	2
39	3
40	7
41	1
42	6
43	1
44	4
45	8
46	2
47	1
48	9
49	7
50	9
51	3
52	4
53	1
54	10
55	5
56	8
57	3
58	2
59	1
60	10
61	1
62	2
63	9
64	6
65	5
66	6
67	1
68	4
69	3
70	10
71	1
72	11
73	1
74	2
75	11
76	4
77	7
78	6
79	1
80	12
81	12
82	2
83	1
84	11
85	5
86	2
87	3
88	8
89	1
90	13
91	7
92	4
93	3
94	2
95	5
96	13
97	1
98	12
99	9

[1, 1, 1, 2, 1, 2, 1, 3, 3, 2, 1, 4, 1, 2, 3, 4, 1, 5, 1, 4, 3, 2, 1, 6, 5, 2, 7, 4, 1, 6, 1, 5, 3, 2, 5, 8, 1, 2, 3, 7, 1, 6, 1, 4, 8, 2, 1, 9, 7, 9, 3, 4, 1, 10, 5, 8, 3, 2, 1, 10, 1, 2, 9, 6, 5, 6, 1, 4, 3, 10, 1, 11, 1, 2, 11, 4, 7, 6, 1, 12, 12, 2, 1, 11, 5, 2, 3, 8, 1, 13, 7, 4, 3, 2, 5, 13, 1, 12, 9]

cp's OEIS Frontend

A078899 Number of times the greatest prime factor of n is the greatest prime factor for numbers <=n; a(1)=1.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	3
10	2
11	1
12	4
13	1
14	2
15	3
16	4
17	1
18	5
19	1
20	4
21	3
22	2
23	1
24	6
25	5
26	2
27	7
28	4
29	1
30	6
31	1
32	5
33	3
34	2
35	5
36	8
37	1
38	2
39	3
40	7
41	1
42	6
43	1
44	4
45	8
46	2
47	1
48	9
49	7
50	9
51	3
52	4
53	1
54	10
55	5
56	8
57	3
58	2
59	1
60	10
61	1
62	2
63	9
64	6
65	5
66	6
67	1
68	4
69	3
70	10
71	1
72	11
73	1
74	2
75	11
76	4
77	7
78	6
79	1
80	12
81	12
82	2
83	1
84	11
85	5
86	2
87	3
88	8
89	1
90	13
91	7
92	4
93	3
94	2
95	5
96	13
97	1
98	12
99	9

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	3
10	2
11	1
12	4
13	1
14	2
15	3
16	4
17	1
18	5
19	1
20	4
21	3
22	2
23	1
24	6
25	5
26	2
27	7
28	4
29	1
30	6
31	1
32	5
33	3
34	2
35	5
36	8
37	1
38	2
39	3
40	7
41	1
42	6
43	1
44	4
45	8
46	2
47	1
48	9
49	7
50	9
51	3
52	4
53	1
54	10
55	5
56	8
57	3
58	2
59	1
60	10
61	1
62	2
63	9
64	6
65	5
66	6
67	1
68	4
69	3
70	10
71	1
72	11
73	1
74	2
75	11
76	4
77	7
78	6
79	1
80	12
81	12
82	2
83	1
84	11
85	5
86	2
87	3
88	8
89	1
90	13
91	7
92	4
93	3
94	2
95	5
96	13
97	1
98	12
99	9

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	1
8	3
9	3
10	2
11	1
12	4
13	1
14	2
15	3
16	4
17	1
18	5
19	1
20	4
21	3
22	2
23	1
24	6
25	5
26	2
27	7
28	4
29	1
30	6
31	1
32	5
33	3
34	2
35	5
36	8
37	1
38	2
39	3
40	7
41	1
42	6
43	1
44	4
45	8
46	2
47	1
48	9
49	7
50	9
51	3
52	4
53	1
54	10
55	5
56	8
57	3
58	2
59	1
60	10
61	1
62	2
63	9
64	6
65	5
66	6
67	1
68	4
69	3
70	10
71	1
72	11
73	1
74	2
75	11
76	4
77	7
78	6
79	1
80	12
81	12
82	2
83	1
84	11
85	5
86	2
87	3
88	8
89	1
90	13
91	7
92	4
93	3
94	2
95	5
96	13
97	1
98	12
99	9