OFFSET
0,2
COMMENTS
Chebyshev polynomial of the second kind U(6,n).
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..1000
FORMULA
G.f.: (-1 + 14*x + 2841*x^2 + 20196*x^3 + 20161*x^4 + 2862*x^5 + 7*x^6)/(1 - x)^7.
a(n) = (8*n^3-4*n^2-4*n+1)*(8*n^3+4*n^2-4*n-1).
MATHEMATICA
Table[64 n^6 - 80 n^4 + 24 n^2 - 1, {n, 0, 40}] (* or *) Table[ChebyshevU[6, n], {n, 0, 40}]
PROG
(Magma) [64*n^6-80*n^4+24*n^2-1: n in [0..40]];
CROSSREFS
KEYWORD
sign,easy
AUTHOR
Vincenzo Librandi, May 29 2014
EXTENSIONS
Edited by Bruno Berselli, May 29 2014
STATUS
approved