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 A321539 3^n with digits rearranged into nonincreasing order. 14
 1, 3, 9, 72, 81, 432, 972, 8721, 6651, 98631, 99540, 777411, 544311, 9543321, 9987642, 98744310, 76443210, 964321110, 988744320, 7666422111, 8876444310, 65433321000, 99865331100, 98877443211, 988654432221, 988876444320, 9888655432221 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Paolo Xausa, Table of n, a(n) for n = 0..1000 FORMULA a(n) = A004186(A000244(n)). - Michel Marcus, Nov 10 2022 MATHEMATICA A321539[n_]:=FromDigits[ReverseSort[IntegerDigits[3^n]]]; Array[A321539, 40, 0] (* Paolo Xausa, Aug 10 2023 *) PROG (Python) def A321539(n): return int(''.join(sorted(str(3**n), reverse=True))) # Chai Wah Wu, Nov 10 2022 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). Cf. A004186. Sequence in context: A318030 A018564 A004167 * A163632 A321541 A102322 Adjacent sequences: A321536 A321537 A321538 * A321540 A321541 A321542 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Nov 19 2018 STATUS approved

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Last modified April 20 05:25 EDT 2024. Contains 371798 sequences. (Running on oeis4.)