2n-th derivative of sech(x)^sech(x) at x=0.

A186250

2n-th derivative of sech(x)^sech(x) at x=0.

Terms

    a(0) =1a(1) =-1a(2) =11a(3) =-256a(4) =10541a(5) =-672136a(6) =61001951a(7) =-7445096296

External references