a(n) is the smallest number k > 1 such that k^n - 1 is divisible by 3^n.

Terms

a(0) =4a(1) =8a(2) =10a(3) =80a(4) =244a(5) =242a(6) =2188a(7) =6560a(8) =2188a(9) =59048a(10) =177148a(11) =177146a(12) =1594324a(13) =4782968a(14) =4782970a(15) =43046720a(16) =129140164a(17) =43046720a(18) =1162261468a(19) =3486784400a(20) =3486784402a(21) =31381059608a(22) =94143178828a(23) =94143178826a(24) =847288609444a(26) =282429536482