A024840 - cp's OEIS frontend

A024840 a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.

n	a(n)
2	7
3	17
4	31
5	49
6	71
7	97
8	127
9	169
10	209
11	262
12	311
13	375
14	433
15	508
16	575
17	661
18	737
19	834
20	919
21	1027
22	1141
23	1241
24	1366
25	1497
26	1611
27	1753
28	1901
29	2029
30	2188
31	2353
32	2495
33	2671
34	2853
35	3009
36	3202
37	3401
38	3571
39	3781
40	3997
41	4219
42	4409
43	4642
44	4881
45	5126
46	5335
47	5591
48	5853
49	6121
50	6349
51	6628

[7, 17, 31, 49, 71, 97, 127, 169, 209, 262, 311, 375, 433, 508, 575, 661, 737, 834, 919, 1027, 1141, 1241, 1366, 1497, 1611, 1753, 1901, 2029, 2188, 2353, 2495, 2671, 2853, 3009, 3202, 3401, 3571, 3781, 3997, 4219, 4409, 4642, 4881, 5126, 5335, 5591, 5853, 6121, 6349, 6628]

cp's OEIS Frontend

A024840 a(n) = least m such that if r and s in {1/1, 1/2, 1/3, ..., 1/n} satisfy r < s, then r < k/m < (k+2)/m < s for some integer k.

Table of values

List of values