Expansion of sec(arcsinh(x) + tan(x)) (coefficients of even powers only).

A013101

Expansion of sec(arcsinh(x) + tan(x)) (coefficients of even powers only).

Terms

    a(0) =1a(1) =4a(2) =88a(3) =5014a(4) =527624a(5) =89331514a(6) =22153827556

External references