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A028866 Squares of primes having digits in nondecreasing order. 3
4, 9, 25, 49, 169, 289, 1369, 4489, 6889, 11449, 27889, 113569, 134689, 146689, 344569, 2778889, 27777888889, 111113555569, 111133556689, 111333666889, 113344668889, 444444888889, 1111133355666889, 1133444466888889 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
What is the rate of growth of this sequence?
LINKS
MATHEMATICA
Select[Prime[Range[100]]^2, IntegerDigits[#] == Sort[IntegerDigits[#]] &] (* Alonso del Arte, Jan 18 2017 *)
PROG
(PARI) is(n)=my(d=digits(n)); d==vecsort(d) && issquare(n, &n) && isprime(n) \\ Charles R Greathouse IV, Jun 05 2013
CROSSREFS
Subsequence of A052043.
Sequence in context: A357754 A133019 A326708 * A146981 A068373 A030481
KEYWORD
nonn,base,less
AUTHOR
EXTENSIONS
Title changed to reflect terms by Sean A. Irvine, Feb 12 2020
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)