OFFSET
1,2
LINKS
FORMULA
a(n) ~ exp(2*G*n^2/Pi) / 2^(3*n/2 - 5/8), where G is Catalan's constant A006752. - Vaclav Kotesovec, Apr 14 2020
MATHEMATICA
Table[Resultant[ChebyshevT[2*n, x/2], ChebyshevT[2*n, I*x/2], x]^(1/4) / 2^((n-1)/2), {n, 1, 15}] (* Vaclav Kotesovec, Apr 14 2020 *)
PROG
(PARI) {a(n) = sqrtint(sqrtint(polresultant(polchebyshev(2*n, 1, x/2), polchebyshev(2*n, 1, I*x/2)))/2^(n-1))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Seiichi Manyama, Apr 14 2020
STATUS
approved