INVERT transform of [1, 0, 1, 3, 9, 27, 81, ...].

Terms

a(0) =1a(1) =1a(2) =2a(3) =6a(4) =19a(5) =60a(6) =189a(7) =595a(8) =1873a(9) =5896a(10) =18560a(11) =58425a(12) =183916a(13) =578949a(14) =1822473a(15) =5736961a(16) =18059374a(17) =56849086a(18) =178955183a(19) =563332848a(20) =1773314929a(21) =5582216355a(22) =17572253481a(23) =55315679788a(24) =174128175064a(25) =548137914373