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A082921 Sort the digits of these squares into descending order and drop zeros to get primes. 1
16, 121, 361, 1024, 1369, 1444, 1600, 1936, 2116, 2401, 3481, 3721, 3844, 5041, 6241, 7921, 8281, 8836, 10201, 11236, 12100, 12544, 13924, 15625, 16129, 17956, 18496, 20164, 21316, 21904, 22201, 22801, 33124, 33856, 34969, 36100, 38809, 39601 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(4)=1024 because 32^2 = 1024 and 421 is prime.
MATHEMATICA
Select[Range[200]^2, PrimeQ[FromDigits[Reverse[Sort[DeleteCases[ IntegerDigits[ #], 0]]]]]&] (* Harvey P. Dale, Dec 02 2018 *)
CROSSREFS
Sequence in context: A161851 A171584 A017030 * A191902 A294140 A014765
KEYWORD
base,nonn
AUTHOR
Jason Earls, May 25 2003
STATUS
approved

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Last modified July 16 05:19 EDT 2024. Contains 374343 sequences. (Running on oeis4.)