A086840 - OEIS

A086840

Resultant of the polynomial x^n-1 and the Chebyshev polynomial of the first kind T_n(x).

%I #9 Sep 27 2019 07:50:00

%S 1,1,37,289,411701,28976689,1273783660297,870606927590401,

%T 1051623015879083528521,7387282445437833999729601,

%U 228573356812047967600677951727277,17196096115608785185990414864152913921,12984855868007714242218321109394633690404079101

%N Resultant of the polynomial x^n-1 and the Chebyshev polynomial of the first kind T_n(x).

%H Andrew Howroyd, <a href="/A086840/b086840.txt">Table of n, a(n) for n = 1..50</a>

%t a[n_] := Resultant[x^n - 1, ChebyshevT[n, x], x];

%t a /@ Range[1, 13] (* _Jean-François Alcover_, Sep 27 2019 *)

%o (PARI) a(n)={polresultant(x^n-1, polchebyshev(n, 1, x))} \\ _Andrew Howroyd_, Jul 09 2018

%K nonn

%O 1,3

%A Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 08 2003

%E a(12)-a(13) from _Andrew Howroyd_, Jul 09 2018