A078898 - cp's OEIS frontend

A078898 Number of times the smallest prime factor of n is the smallest prime factor for numbers <= n; a(0)=0, a(1)=1.

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	6
13	1
14	7
15	3
16	8
17	1
18	9
19	1
20	10
21	4
22	11
23	1
24	12
25	2
26	13
27	5
28	14
29	1
30	15
31	1
32	16
33	6
34	17
35	3
36	18
37	1
38	19
39	7
40	20
41	1
42	21
43	1
44	22
45	8
46	23
47	1
48	24
49	2
50	25
51	9
52	26
53	1
54	27
55	4
56	28
57	10
58	29
59	1
60	30
61	1
62	31
63	11
64	32
65	5
66	33
67	1
68	34
69	12
70	35
71	1
72	36
73	1
74	37
75	13
76	38
77	3
78	39
79	1
80	40
81	14
82	41
83	1
84	42
85	6
86	43

[0, 1, 1, 1, 2, 1, 3, 1, 4, 2, 5, 1, 6, 1, 7, 3, 8, 1, 9, 1, 10, 4, 11, 1, 12, 2, 13, 5, 14, 1, 15, 1, 16, 6, 17, 3, 18, 1, 19, 7, 20, 1, 21, 1, 22, 8, 23, 1, 24, 2, 25, 9, 26, 1, 27, 4, 28, 10, 29, 1, 30, 1, 31, 11, 32, 5, 33, 1, 34, 12, 35, 1, 36, 1, 37, 13, 38, 3, 39, 1, 40, 14, 41, 1, 42, 6, 43]

cp's OEIS Frontend

A078898 Number of times the smallest prime factor of n is the smallest prime factor for numbers <= n; a(0)=0, a(1)=1.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	6
13	1
14	7
15	3
16	8
17	1
18	9
19	1
20	10
21	4
22	11
23	1
24	12
25	2
26	13
27	5
28	14
29	1
30	15
31	1
32	16
33	6
34	17
35	3
36	18
37	1
38	19
39	7
40	20
41	1
42	21
43	1
44	22
45	8
46	23
47	1
48	24
49	2
50	25
51	9
52	26
53	1
54	27
55	4
56	28
57	10
58	29
59	1
60	30
61	1
62	31
63	11
64	32
65	5
66	33
67	1
68	34
69	12
70	35
71	1
72	36
73	1
74	37
75	13
76	38
77	3
78	39
79	1
80	40
81	14
82	41
83	1
84	42
85	6
86	43

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	6
13	1
14	7
15	3
16	8
17	1
18	9
19	1
20	10
21	4
22	11
23	1
24	12
25	2
26	13
27	5
28	14
29	1
30	15
31	1
32	16
33	6
34	17
35	3
36	18
37	1
38	19
39	7
40	20
41	1
42	21
43	1
44	22
45	8
46	23
47	1
48	24
49	2
50	25
51	9
52	26
53	1
54	27
55	4
56	28
57	10
58	29
59	1
60	30
61	1
62	31
63	11
64	32
65	5
66	33
67	1
68	34
69	12
70	35
71	1
72	36
73	1
74	37
75	13
76	38
77	3
78	39
79	1
80	40
81	14
82	41
83	1
84	42
85	6
86	43

n	a(n)
0	0
1	1
2	1
3	1
4	2
5	1
6	3
7	1
8	4
9	2
10	5
11	1
12	6
13	1
14	7
15	3
16	8
17	1
18	9
19	1
20	10
21	4
22	11
23	1
24	12
25	2
26	13
27	5
28	14
29	1
30	15
31	1
32	16
33	6
34	17
35	3
36	18
37	1
38	19
39	7
40	20
41	1
42	21
43	1
44	22
45	8
46	23
47	1
48	24
49	2
50	25
51	9
52	26
53	1
54	27
55	4
56	28
57	10
58	29
59	1
60	30
61	1
62	31
63	11
64	32
65	5
66	33
67	1
68	34
69	12
70	35
71	1
72	36
73	1
74	37
75	13
76	38
77	3
78	39
79	1
80	40
81	14
82	41
83	1
84	42
85	6
86	43