Inverse modulo 2 binomial transform of 3^n.

Terms

a(0) =1a(1) =2a(2) =8a(3) =16a(4) =80a(5) =160a(6) =640a(7) =1280a(8) =6560a(9) =13120a(10) =52480a(11) =104960a(12) =524800a(13) =1049600a(14) =4198400a(15) =8396800a(16) =43046720a(17) =86093440a(18) =344373760a(19) =688747520a(20) =3443737600a(21) =6887475200a(22) =27549900800a(23) =55099801600a(24) =282386483200a(25) =564772966400