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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.

A343260 a(n) = 2 * T(n,(n+1)/2) where T(n,x) is a Chebyshev polynomial of the first kind.

Table of values

n a(n)
0 2
1 2
2 7
3 52
4 527
5 6726
6 103682
7 1874888
8 38925119
9 912670090
10 23855111399
11 687808321212
12 21687295069442
13 742397047217294
14 27420344506901023
15 1086932029484351248
16 46027034321342899967
17 2073668380220713167378
18 99042070146811639444802

List of values

[2, 2, 7, 52, 527, 6726, 103682, 1874888, 38925119, 912670090, 23855111399, 687808321212, 21687295069442, 742397047217294, 27420344506901023, 1086932029484351248, 46027034321342899967, 2073668380220713167378, 99042070146811639444802]

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

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