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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.

A349075 a(n) = U(n, 2*n), where U(n, x) is the Chebyshev polynomial of the second kind.

Table of values

n a(n)
0 1
1 4
2 63
3 1704
4 64769
5 3168060
6 189447551
7 13389885712
8 1092011153409
9 100934312212404
10 10426892198423999
11 1190514147664125240
12 148874434455514989313
13 20235554722675691942764
14 2970511463324707397138175
15 468359315014627272862943520
16 78938449723310515780367269889

List of values

[1, 4, 63, 1704, 64769, 3168060, 189447551, 13389885712, 1092011153409, 100934312212404, 10426892198423999, 1190514147664125240, 148874434455514989313, 20235554722675691942764, 2970511463324707397138175, 468359315014627272862943520, 78938449723310515780367269889]

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

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