OFFSET
0,3
FORMULA
a(n) = -2*n*(4^n - 2)*(4^n - 1)*zeta(1 - 2*n) for n >= 1.
MAPLE
a := n -> `if`(n = 0, 0, -2*n*(4^n - 2)*(4^n - 1)*Zeta(1 - 2*n)):
seq(a(n), n = 0..16);
MATHEMATICA
Table[6 QBinomial[2 n, 2, 2] BernoulliB[2 n, 1], {n, 0, 16}]
CROSSREFS
KEYWORD
sign
AUTHOR
Peter Luschny, Jul 19 2021
STATUS
approved