OFFSET
0,2
LINKS
Paolo Xausa, Table of n, a(n) for n = 0..1000
FORMULA
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.
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, Nov 19 2018
STATUS
approved