E.g.f.: log(sec(x)+arcsinh(x)) = x-2/3!*x^3+12/4!*x^4-32/5!*x^5+72/6!*x^6...

A013198

E.g.f.: log(sec(x)+arcsinh(x)) = x-2/3!*x^3+12/4!*x^4-32/5!*x^5+72/6!*x^6...

Terms

    a(0) =0a(1) =1a(2) =0a(3) =-2a(4) =12a(5) =-32a(6) =72a(7) =152a(8) =-3808a(9) =48448a(10) =-333440a(11) =289408a(12) =26461952a(13) =-393649024a(14) =4126861312a(15) =-34249082624a(16) =-93963415552

External references