sec(tanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+100/5!*x^5...

A012662

sec(tanh(x)*exp(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+100/5!*x^5...

Terms

    a(0) =1a(1) =0a(2) =1a(3) =6a(4) =21a(5) =100a(6) =957a(7) =8498a(8) =70217a(9) =762696a(10) =9950809a(11) =128378910a(12) =1775380893a(13) =28325140012a(14) =483428842197

External references