sech(exp(x)-sec(x))=1-1/2!*x^2+1/4!*x^4+20/5!*x^5+23/6!*x^6...

A013339

sech(exp(x)-sec(x))=1-1/2!*x^2+1/4!*x^4+20/5!*x^5+23/6!*x^6...

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =0a(4) =1a(5) =20a(6) =23a(7) =-140a(8) =-975a(9) =-1656a(10) =74751a(11) =365640a(12) =1284369a(13) =-26269412a(14) =-120532297a(15) =1518753340a(16) =37230940193a(17) =312855107472

External references