A076221 - cp's OEIS frontend

A076221 Triangle read by rows: A(n,k) is the number of x, x<=n, which are coprime to and not equal to k.

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	3
13	4
14	3
15	4
16	5
17	3
18	4
19	3
20	5
21	2
22	6
23	4
24	5
25	4
26	6
27	3
28	6
29	7
30	4
31	6
32	4
33	7
34	3
35	7
36	4
37	8
38	5
39	6
40	5
41	8
42	3
43	8
44	5
45	6
46	9
47	5
48	7
49	5
50	8
51	3
52	9
53	5
54	7
55	4
56	10
57	6
58	8
59	6
60	9
61	4
62	10
63	6
64	8
65	5
66	10
67	11
68	6
69	8
70	6
71	10
72	4
73	11
74	6
75	8
76	5
77	11
78	4
79	12
80	7
81	9
82	7
83	11
84	5
85	12
86	7
87	9
88	6
89	12
90	5
91	12

[0, 1, 1, 2, 2, 2, 3, 2, 3, 2, 4, 3, 4, 3, 4, 5, 3, 4, 3, 5, 2, 6, 4, 5, 4, 6, 3, 6, 7, 4, 6, 4, 7, 3, 7, 4, 8, 5, 6, 5, 8, 3, 8, 5, 6, 9, 5, 7, 5, 8, 3, 9, 5, 7, 4, 10, 6, 8, 6, 9, 4, 10, 6, 8, 5, 10, 11, 6, 8, 6, 10, 4, 11, 6, 8, 5, 11, 4, 12, 7, 9, 7, 11, 5, 12, 7, 9, 6, 12, 5, 12]

cp's OEIS Frontend

A076221 Triangle read by rows: A(n,k) is the number of x, x<=n, which are coprime to and not equal to k.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	3
13	4
14	3
15	4
16	5
17	3
18	4
19	3
20	5
21	2
22	6
23	4
24	5
25	4
26	6
27	3
28	6
29	7
30	4
31	6
32	4
33	7
34	3
35	7
36	4
37	8
38	5
39	6
40	5
41	8
42	3
43	8
44	5
45	6
46	9
47	5
48	7
49	5
50	8
51	3
52	9
53	5
54	7
55	4
56	10
57	6
58	8
59	6
60	9
61	4
62	10
63	6
64	8
65	5
66	10
67	11
68	6
69	8
70	6
71	10
72	4
73	11
74	6
75	8
76	5
77	11
78	4
79	12
80	7
81	9
82	7
83	11
84	5
85	12
86	7
87	9
88	6
89	12
90	5
91	12

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	3
13	4
14	3
15	4
16	5
17	3
18	4
19	3
20	5
21	2
22	6
23	4
24	5
25	4
26	6
27	3
28	6
29	7
30	4
31	6
32	4
33	7
34	3
35	7
36	4
37	8
38	5
39	6
40	5
41	8
42	3
43	8
44	5
45	6
46	9
47	5
48	7
49	5
50	8
51	3
52	9
53	5
54	7
55	4
56	10
57	6
58	8
59	6
60	9
61	4
62	10
63	6
64	8
65	5
66	10
67	11
68	6
69	8
70	6
71	10
72	4
73	11
74	6
75	8
76	5
77	11
78	4
79	12
80	7
81	9
82	7
83	11
84	5
85	12
86	7
87	9
88	6
89	12
90	5
91	12

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	2
7	3
8	2
9	3
10	2
11	4
12	3
13	4
14	3
15	4
16	5
17	3
18	4
19	3
20	5
21	2
22	6
23	4
24	5
25	4
26	6
27	3
28	6
29	7
30	4
31	6
32	4
33	7
34	3
35	7
36	4
37	8
38	5
39	6
40	5
41	8
42	3
43	8
44	5
45	6
46	9
47	5
48	7
49	5
50	8
51	3
52	9
53	5
54	7
55	4
56	10
57	6
58	8
59	6
60	9
61	4
62	10
63	6
64	8
65	5
66	10
67	11
68	6
69	8
70	6
71	10
72	4
73	11
74	6
75	8
76	5
77	11
78	4
79	12
80	7
81	9
82	7
83	11
84	5
85	12
86	7
87	9
88	6
89	12
90	5
91	12