A177903 - cp's OEIS frontend

A177903 Consider the weighted Farey tree A177405/A177407; a(n) = row at which the denominator 2n+1 first appears (assumes first row is labeled row 0).

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

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

cp's OEIS Frontend

A177903 Consider the weighted Farey tree A177405/A177407; a(n) = row at which the denominator 2n+1 first appears (assumes first row is labeled row 0).

Table of values

List of values

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

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

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