A338579 - cp's OEIS frontend

A338579 Triangle T(D,N) read by rows, 1 <= N < D >= 2, where T(D,N) is the position of the fraction N/D in the Farey tree (or Stern-Brocot subtree) A007305/A007306.

n	a(n)
2	2
3	3
4	4
5	5
6	2
7	8
8	9
9	6
10	7
11	16
12	17
13	3
14	2
15	4
16	32
17	33
18	10
19	12
20	13
21	15
22	64
23	65
24	5
25	11
26	2
27	14
28	8
29	128
30	129
31	18
32	3
33	24
34	25
35	4
36	31
37	256
38	257
39	9
40	20
41	6
42	2
43	7
44	29
45	16
46	512
47	513
48	34
49	19
50	21
51	48
52	49
53	28
54	30
55	63
56	1024
57	1025
58	17
59	5
60	3
61	23
62	2
63	26
64	4
65	8
66	32
67	2048

[2, 3, 4, 5, 2, 8, 9, 6, 7, 16, 17, 3, 2, 4, 32, 33, 10, 12, 13, 15, 64, 65, 5, 11, 2, 14, 8, 128, 129, 18, 3, 24, 25, 4, 31, 256, 257, 9, 20, 6, 2, 7, 29, 16, 512, 513, 34, 19, 21, 48, 49, 28, 30, 63, 1024, 1025, 17, 5, 3, 23, 2, 26, 4, 8, 32, 2048]

cp's OEIS Frontend

A338579 Triangle T(D,N) read by rows, 1 <= N < D >= 2, where T(D,N) is the position of the fraction N/D in the Farey tree (or Stern-Brocot subtree) A007305/A007306.

Table of values

List of values