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.

A265811 Denominators of upper primes-only best approximates (POBAs) to Pi; see Comments.

Table of values

n a(n)
1 2
2 5
3 7
4 13
5 53
6 67
7 137
8 179
9 181
10 197
11 353
12 1723
13 3319
14 5113
15 6469
16 9181
17 15269
18 17981
19 22727
20 24083
21 31541
22 34253
23 37643
24 46457
25 64763
26 67447
27 199403
28 531101
29 1791689
30 5175551
31 6369709
32 12141887
33 12871487
34 23089051
35 29723689
36 36424757
37 43324889
38 84725681
39 105426077
40 110667493

List of values

[2, 5, 7, 13, 53, 67, 137, 179, 181, 197, 353, 1723, 3319, 5113, 6469, 9181, 15269, 17981, 22727, 24083, 31541, 34253, 37643, 46457, 64763, 67447, 199403, 531101, 1791689, 5175551, 6369709, 12141887, 12871487, 23089051, 29723689, 36424757, 43324889, 84725681, 105426077, 110667493]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.