OFFSET
1,1
COMMENTS
No other solutions below 4 * 10^18 (probably finite). - Dec 15 1999
EXAMPLE
961 = 31^2 is in the sequence since its digits (9, 6, 1) are in descending order.
1369 = 37^2 is not in the sequence, since its digits in descending order are: 9, 6, 3, 1.
MATHEMATICA
Select[Prime[Range[100]]^2, IntegerDigits[#] == Sort[IntegerDigits[#], Less] &] (* Alonso del Arte, Aug 12 2016 *)
CROSSREFS
KEYWORD
nonn,base,hard,more
AUTHOR
EXTENSIONS
Offset changed by Altug Alkan, Sep 09 2016
Name clarified by Jon E. Schoenfield, Oct 27 2023
STATUS
approved