A006842 - cp's OEIS frontend

A006842 Triangle read by rows: row n gives numerators of Farey series of order n.

n	a(n)
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	1
11	0
12	1
13	1
14	1
15	2
16	3
17	1
18	0
19	1
20	1
21	1
22	2
23	1
24	3
25	2
26	3
27	4
28	1
29	0
30	1
31	1
32	1
33	1
34	2
35	1
36	3
37	2
38	3
39	4
40	5
41	1
42	0
43	1
44	1
45	1
46	1
47	2
48	1
49	2
50	3
51	1
52	4
53	3
54	2
55	5
56	3
57	4
58	5
59	6
60	1
61	0
62	1
63	1
64	1
65	1
66	1
67	2
68	1
69	3
70	2
71	3
72	1
73	4
74	3
75	5
76	2
77	5
78	3
79	4
80	5
81	6
82	7
83	1
84	0
85	1
86	1
87	1
88	1
89	1
90	2
91	1
92	2
93	1
94	3
95	2
96	3
97	4
98	1
99	5
100	4
101	3
102	5
103	2
104	5
105	3
106	7
107	4
108	5
109	6
110	7
111	8
112	1

[0, 1, 0, 1, 1, 0, 1, 1, 2, 1, 0, 1, 1, 1, 2, 3, 1, 0, 1, 1, 1, 2, 1, 3, 2, 3, 4, 1, 0, 1, 1, 1, 1, 2, 1, 3, 2, 3, 4, 5, 1, 0, 1, 1, 1, 1, 2, 1, 2, 3, 1, 4, 3, 2, 5, 3, 4, 5, 6, 1, 0, 1, 1, 1, 1, 1, 2, 1, 3, 2, 3, 1, 4, 3, 5, 2, 5, 3, 4, 5, 6, 7, 1, 0, 1, 1, 1, 1, 1, 2, 1, 2, 1, 3, 2, 3, 4, 1, 5, 4, 3, 5, 2, 5, 3, 7, 4, 5, 6, 7, 8, 1]

cp's OEIS Frontend

A006842 Triangle read by rows: row n gives numerators of Farey series of order n.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	1
11	0
12	1
13	1
14	1
15	2
16	3
17	1
18	0
19	1
20	1
21	1
22	2
23	1
24	3
25	2
26	3
27	4
28	1
29	0
30	1
31	1
32	1
33	1
34	2
35	1
36	3
37	2
38	3
39	4
40	5
41	1
42	0
43	1
44	1
45	1
46	1
47	2
48	1
49	2
50	3
51	1
52	4
53	3
54	2
55	5
56	3
57	4
58	5
59	6
60	1
61	0
62	1
63	1
64	1
65	1
66	1
67	2
68	1
69	3
70	2
71	3
72	1
73	4
74	3
75	5
76	2
77	5
78	3
79	4
80	5
81	6
82	7
83	1
84	0
85	1
86	1
87	1
88	1
89	1
90	2
91	1
92	2
93	1
94	3
95	2
96	3
97	4
98	1
99	5
100	4
101	3
102	5
103	2
104	5
105	3
106	7
107	4
108	5
109	6
110	7
111	8
112	1

n	a(n)
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	1
11	0
12	1
13	1
14	1
15	2
16	3
17	1
18	0
19	1
20	1
21	1
22	2
23	1
24	3
25	2
26	3
27	4
28	1
29	0
30	1
31	1
32	1
33	1
34	2
35	1
36	3
37	2
38	3
39	4
40	5
41	1
42	0
43	1
44	1
45	1
46	1
47	2
48	1
49	2
50	3
51	1
52	4
53	3
54	2
55	5
56	3
57	4
58	5
59	6
60	1
61	0
62	1
63	1
64	1
65	1
66	1
67	2
68	1
69	3
70	2
71	3
72	1
73	4
74	3
75	5
76	2
77	5
78	3
79	4
80	5
81	6
82	7
83	1
84	0
85	1
86	1
87	1
88	1
89	1
90	2
91	1
92	2
93	1
94	3
95	2
96	3
97	4
98	1
99	5
100	4
101	3
102	5
103	2
104	5
105	3
106	7
107	4
108	5
109	6
110	7
111	8
112	1

n	a(n)
1	0
2	1
3	0
4	1
5	1
6	0
7	1
8	1
9	2
10	1
11	0
12	1
13	1
14	1
15	2
16	3
17	1
18	0
19	1
20	1
21	1
22	2
23	1
24	3
25	2
26	3
27	4
28	1
29	0
30	1
31	1
32	1
33	1
34	2
35	1
36	3
37	2
38	3
39	4
40	5
41	1
42	0
43	1
44	1
45	1
46	1
47	2
48	1
49	2
50	3
51	1
52	4
53	3
54	2
55	5
56	3
57	4
58	5
59	6
60	1
61	0
62	1
63	1
64	1
65	1
66	1
67	2
68	1
69	3
70	2
71	3
72	1
73	4
74	3
75	5
76	2
77	5
78	3
79	4
80	5
81	6
82	7
83	1
84	0
85	1
86	1
87	1
88	1
89	1
90	2
91	1
92	2
93	1
94	3
95	2
96	3
97	4
98	1
99	5
100	4
101	3
102	5
103	2
104	5
105	3
106	7
107	4
108	5
109	6
110	7
111	8
112	1