sech(sin(x)-tan(x))=1-90/6!*x^6-2520/8!*x^8-126630/10!*x^10...

A013359

sech(sin(x)-tan(x))=1-90/6!*x^6-2520/8!*x^8-126630/10!*x^10...

Terms

    a(0) =1a(1) =0a(2) =0a(3) =-90a(4) =-2520a(5) =-126630a(6) =-2243340a(7) =382612230a(8) =134674853040

External references