OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
EXAMPLE
a(1)=6 because Zeta(2*1)=Pi^2/6 implies Pi^2/Zeta(2)=6 and floor(6)=6.
a(6)=924041 because Zeta(2*6)=691/638512875*Pi^12 implies Pi^12/Zeta(12)=638512875/691 and floor(638512875/691)=924041.
MAPLE
seq(simplify(floor(Pi^(2*k)/Zeta(2*k))), k=1..24);
MATHEMATICA
Table[Floor[Pi^(2*n)/Zeta[2*n]], {n, 20}] (* Terry D. Grant, May 28 2017 *)
PROG
(PARI) {a(n)=if(n<1, 0, floor(-2*(2*n)!/(-4)^n/bernfrac(2*n)))} /* Michael Somos, Feb 18 2007 */
CROSSREFS
KEYWORD
nonn
AUTHOR
Joseph Biberstine (jrbibers(AT)indiana.edu), Nov 30 2004
STATUS
approved