cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A024848 a(n) = least m such that if r and s in {1/2, 1/4, 1/6, ..., 1/2n} satisfy r < s, then r < k/m < (k+4)/m < s for some integer k.

Table of values

n a(n)
2 19
3 53
4 103
5 169
6 251
7 349
8 463
9 593
10 739
11 901
12 1101
13 1299
14 1537
15 1769
16 2045
17 2311
18 2625
19 2925
20 3277
21 3611
22 4001
23 4369
24 4797
25 5199
26 5665
27 6101
28 6605
29 7075
30 7617
31 8121
32 8701
33 9301
34 9859
35 10497
36 11155
37 11765
38 12461
39 13177
40 13839
41 14593
42 15367
43 16081
44 16893
45 17725

List of values

[19, 53, 103, 169, 251, 349, 463, 593, 739, 901, 1101, 1299, 1537, 1769, 2045, 2311, 2625, 2925, 3277, 3611, 4001, 4369, 4797, 5199, 5665, 6101, 6605, 7075, 7617, 8121, 8701, 9301, 9859, 10497, 11155, 11765, 12461, 13177, 13839, 14593, 15367, 16081, 16893, 17725]