A083055 - cp's OEIS frontend

A083055 a(n) = cardinality{ k<=n / A083054(k)=1}.

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

[1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6, 6, 7, 7, 8, 8, 8, 8, 8, 9, 9, 10, 10, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 14, 14, 14, 15, 15, 16, 16, 16, 16, 16, 17, 17, 18, 18, 18, 18, 18, 19, 19, 20, 20, 20, 21, 21, 22, 22, 22, 22, 22, 23, 23, 24, 24, 24, 24, 24, 25, 25]

cp's OEIS Frontend

A083055 a(n) = cardinality{ k<=n / A083054(k)=1}.

Table of values

List of values

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

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

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