OFFSET
1,1
FORMULA
a(n) = floor(1/C(2n)), where C(2n) is the 2n-th Du Bois Reymond constant. [From Max Alekseyev, Sep 15 2009]
MATHEMATICA
a = {}; Do[AppendTo[a, Last[ContinuedFraction[FullSimplify[TrigToExp[ -3 - 2Residue[x^2/((Tan[x] - x) (1 + x^2)^n), {x, I}]]], 2]]], {n, 1, 9}]; a (*Artur Jasinski*)
CROSSREFS
KEYWORD
nonn
AUTHOR
Artur Jasinski, Mar 26 2008
EXTENSIONS
Extended by Max Alekseyev, Sep 15 2009
STATUS
approved