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 A004167 Powers of 3 written backwards. 16
 1, 3, 9, 72, 18, 342, 927, 7812, 1656, 38691, 94095, 741771, 144135, 3234951, 9692874, 70984341, 12764034, 361041921, 984024783, 7641622611, 1044876843, 30235306401, 90695018313, 72887134149, 184635924282, 344906882748, 9238285681452, 7894847955267 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS From a(2) onwards, all terms are divisible by 9. - Alonso del Arte, Apr 04 2014 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..1000 FORMULA a(n) = A004086(A000244(n)). - Michel Marcus, Apr 05 2014 EXAMPLE a(5) = 342 since 3^5 = 243. MAPLE a:= n-> (s-> parse(cat(s[-i]\$i=1..length(s))))(""||(3^n)): seq(a(n), n=0..50);  # Alois P. Heinz, Apr 09 2015 MATHEMATICA Table[FromDigits[Reverse[IntegerDigits[3^n]]], {n, 0, 26}] (* Alonso del Arte, Apr 04 2014 *) CROSSREFS The following are parallel families: A000079 (2^n), A004094 (2^n reversed), A028909 (2^n sorted up), A028910 (2^n sorted down), A036447 (double and reverse), A057615 (double and sort up), A263451 (double and sort down); A000244 (3^n), A004167 (3^n reversed), A321540 (3^n sorted up), A321539 (3^n sorted down), A163632 (triple and reverse), A321542 (triple and sort up), A321541 (triple and sort down). Sequence in context: A318030 A018564 A305855 * A321539 A163632 A321541 Adjacent sequences:  A004164 A004165 A004166 * A004168 A004169 A004170 KEYWORD nonn,base,easy AUTHOR EXTENSIONS More terms from Eric M. Schmidt, Apr 04 2014 STATUS approved

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Last modified February 16 21:22 EST 2019. Contains 320199 sequences. (Running on oeis4.)