|
| |
|
|
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
|
Table of n, a(n) for n=0..26.
|
|
|
FORMULA
|
a(n) = A004186(A000244(n)). - Michel Marcus, Nov 10 2022
|
|
|
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
|
| |
|
|
