Real term generated from a complex product operation.

A121735

Real term generated from a complex product operation.

Terms

    a(0) =1a(1) =-1a(2) =6a(3) =-12a(4) =-60a(5) =720a(6) =-2520a(7) =-20160a(8) =362880a(9) =-1814400a(10) =-19958400a(11) =479001600a(12) =-3113510400a(13) =-43589145600

External references