a(n) = 10^n mod 3^n.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =37a(5) =127a(6) =541a(7) =1036a(8) =3799a(9) =5185a(10) =51850a(11) =164206a(12) =224884a(13) =1185958a(14) =3887965a(15) =5398867a(16) =10941949a(17) =66372769a(18) =276307201a(19) =438549076a(20) =3223229293a(21) =7824802123a(22) =15485902012a(23) =60715841293a(24) =42299339968a(25) =705422936161