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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.

A342168 a(n) = U(n, (n+3)/2) where U(n, x) is a Chebyshev polynomial of the 2nd kind.

Table of values

n a(n)
0 1
1 4
2 24
3 204
4 2255
5 30744
6 499121
7 9409960
8 202176360
9 4878316860
10 130651068911
11 3846719565780
12 123517560398401
13 4296240885694576
14 160935647131239840
15 6460088606857290384
16 276655979838719058119
17 12591439417867717440180
18 606947064800948702246681

List of values

[1, 4, 24, 204, 2255, 30744, 499121, 9409960, 202176360, 4878316860, 130651068911, 3846719565780, 123517560398401, 4296240885694576, 160935647131239840, 6460088606857290384, 276655979838719058119, 12591439417867717440180, 606947064800948702246681]

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

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