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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.

A343261 a(n) = 2 * T(n,(n+2)/2) where T(n,x) is a Chebyshev polynomial of the first kind.

Table of values

n a(n)
0 2
1 3
2 14
3 110
4 1154
5 15127
6 238142
7 4379769
8 92198402
9 2186871698
10 57721023502
11 1678243366813
12 53301709843202
13 1836220544383695
14 68200709735854334
15 2716906424134261502
16 115561578124838522882
17 5227260815326346060059
18 250566480717349417632398

List of values

[2, 3, 14, 110, 1154, 15127, 238142, 4379769, 92198402, 2186871698, 57721023502, 1678243366813, 53301709843202, 1836220544383695, 68200709735854334, 2716906424134261502, 115561578124838522882, 5227260815326346060059, 250566480717349417632398]

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

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