Expansion of tanh(sin(x)^2)/2.

A024262

Expansion of tanh(sin(x)^2)/2.

Terms

    a(0) =0a(1) =1a(2) =-4a(3) =-104a(4) =6656a(5) =-40064a(6) =-42409984a(7) =4996996096a(8) =379877605376

External references