Revert transform of (1 - 3x + x^3)/(1 - 2x - 2x^2).

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =90a(6) =392a(7) =1775a(8) =8252a(9) =39114a(10) =188220a(11) =916920a(12) =4512880a(13) =22406488a(14) =112092264a(15) =564474555a(16) =2859167178a(17) =14557198500a(18) =74459570756a(19) =382441401734