Nonzero numbers in expansion of ((tan(x))^4)/4! in (x^n)/n!.

A060056

Nonzero numbers in expansion of ((tan(x))^4)/4! in (x^n)/n!.

Terms

    a(0) =1a(1) =40a(2) =2016a(3) =135680a(4) =11977856a(5) =1351633920a(6) =190346960896

External references