258280324domain: NAppears in sequencesLargest term in periodic part of continued fraction expansion of square root of -1+3^n.at n=33A077627a(n) = 2*(3^n - 1).at n=17A100774Number of palindromes (in base 3) below 3^n.at n=34A117862Partial sums of A162436.at n=33A164123