OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
FORMULA
MAPLE
remove(n -> numtheory:-issqrfree(n^2-2), [$1..1000]); # Robert Israel, Nov 03 2019
MATHEMATICA
Select[Range[1000], !SquareFreeQ[#^2-2]&] (* Harvey P. Dale, Jun 14 2021 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Gerasimov Sergey, Aug 12 2013
EXTENSIONS
Corrected by R. J. Mathar, Sep 26 2013
STATUS
approved