Coefficient of [x^(4*n+2)] in e.g.f. sinh(cosh(x) - cos(x)).

A013475

Coefficient of [x^(4*n+2)] in e.g.f. sinh(cosh(x) - cos(x)).

Terms

    a(0) =2a(1) =122a(2) =35282a(3) =27747722a(4) =46640267042

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