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.

A144130 a(n) = ChebyshevT(4, n).

Original entry on oeis.org

1, 1, 97, 577, 1921, 4801, 10081, 18817, 32257, 51841, 79201, 116161, 164737, 227137, 305761, 403201, 522241, 665857, 837217, 1039681, 1276801, 1552321, 1870177, 2234497, 2649601, 3120001, 3650401, 4245697, 4910977, 5651521
Offset: 0

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Keywords

Crossrefs

Cf. A144129.

Programs

Formula

From Paul Barry, Nov 17 2009: (Start)
G.f.: (1-4x+102x^2+92x^3+x^4)/(1-x)^5;
a(n) = 8*n^4-8*n^2+1. (End)
a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5). - Wesley Ivan Hurt, Mar 15 2023

Extensions

Changed offset from 1 to 0 by Vincenzo Librandi, May 30 2014