A274771 - cp's OEIS frontend

A274771 Number of primes <= n-th Carmichael lambda number.

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

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

cp's OEIS Frontend

A274771 Number of primes <= n-th Carmichael lambda number.

Table of values

List of values

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

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

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