OFFSET
1,3
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
FORMULA
MAPLE
MATHEMATICA
With[{nn=5000}, Differences[Flatten[Position[Complement[Range[0, nn], Prime[ Range[ PrimePi[nn]]]], _?(IntegerQ[Sqrt[#]]&)]]]] (* Harvey P. Dale, Mar 03 2014 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Daniel Tisdale, Jun 05 2009
EXTENSIONS
Corrected and extended by R. J. Mathar, Jun 22 2009
STATUS
approved