Smallest power of 3 that begins with n.

Terms

a(0) =1a(1) =27a(2) =3a(3) =4782969a(4) =59049a(5) =6561a(6) =729a(7) =81a(8) =9a(9) =10460353203a(10) =1162261467a(11) =129140163a(13) =14348907a(14) =1594323a(16) =177147a(18) =19683a(20) =2187