Dirichlet inverse of A133494, 3^(n-1).

Terms

a(0) =1a(1) =-3a(2) =-9a(3) =-18a(4) =-81a(5) =-189a(6) =-729a(7) =-2052a(8) =-6480a(9) =-19197a(10) =-59049a(11) =-175446a(12) =-531441a(13) =-1589949a(14) =-4781511a(15) =-14335704a(16) =-43046721a(17) =-129097152a(18) =-387420489a(19) =-1162141182a(20) =-3486771279a(21) =-10459998909a(22) =-31381059609a(23) =-94142073420a(24) =-282429529920a(25) =-847285420797