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%I #17 Jul 15 2016 11:20:10
%S 529,729,6889,12769,162409,644809,851929,1261129,47969476,64048009,
%T 317837584,1600240009,2822053129,24421563076,40001200009,84290347584,
%U 107667328129,145381301521,160002400009,437766166321,788815751409
%N Squares n = k^2 with the property that nextprime(k) is a substring of n.
%H Chai Wah Wu, <a href="/A274932/b274932.txt">Table of n, a(n) for n = 1..39</a> (all terms < 4*10^18)
%e 529 = 23^2, and nextprime(23) = 29 is a substring of 529, so 529 is a term.
%t Select[Range[2*10^6]^2,SequenceCount[IntegerDigits[#], IntegerDigits[ NextPrime[ Sqrt[ #]]]]>0&] (* The program uses the SequenceCount function from Mathematica version 10 *) (* _Harvey P. Dale_, Jul 13 2016 *)
%t Select[Range[2*10^6], {} != StringPosition @@ ToString /@ {#^2, NextPrime@ #} &]^2] (* _Giovanni Resta_, Jul 15 2016 *)
%Y Suggested by A052074.
%K nonn,base
%O 1,1
%A _Harvey P. Dale_ and _N. J. A. Sloane_, Jul 13 2016
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