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A138733
Second term of continued fraction for 2n-th Du Bois Reymond constant.
6
5, 190, 4531, 99232, 2125044, 45190209, 958768567, 20325471335, 430773893366, 9128872855695, 193450867955197, 4099389985205820, 86869246502331992, 1840823999333339814, 39008411877876819180, 826616742911186406242
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*)
KEYWORD
nonn
AUTHOR
Artur Jasinski, Mar 26 2008
EXTENSIONS
Extended by Max Alekseyev, Sep 15 2009
STATUS
approved