cp's OEIS Frontend

A086840 Resultant of the polynomial x^n-1 and the Chebyshev polynomial of the first kind T_n(x).

%I A086840 #9 Sep 27 2019 07:50:00
%S A086840 1,1,37,289,411701,28976689,1273783660297,870606927590401,
%T A086840 1051623015879083528521,7387282445437833999729601,
%U A086840 228573356812047967600677951727277,17196096115608785185990414864152913921,12984855868007714242218321109394633690404079101
%N A086840 Resultant of the polynomial x^n-1 and the Chebyshev polynomial of the first kind T_n(x).
%H A086840 Andrew Howroyd, <a href="/A086840/b086840.txt">Table of n, a(n) for n = 1..50</a>
%t A086840 a[n_] := Resultant[x^n - 1, ChebyshevT[n, x], x];
%t A086840 a /@ Range[1, 13] (* _Jean-François Alcover_, Sep 27 2019 *)
%o A086840 (PARI) a(n)={polresultant(x^n-1, polchebyshev(n, 1, x))} \\ _Andrew Howroyd_, Jul 09 2018
%K A086840 nonn
%O A086840 1,3
%A A086840 Yuval Dekel (dekelyuval(AT)hotmail.com), Aug 08 2003
%E A086840 a(12)-a(13) from _Andrew Howroyd_, Jul 09 2018