OFFSET
1,1
LINKS
Felix Fröhlich, Table of n, a(n) for n = 1..10000
MATHEMATICA
fQ[n_] := Block[{c = DigitCount@ n}, And[Plus @@ Take[c, {7, 9}] == 0, c[[6]] > 0, c[[10]] > 0]]; Select[Range@ 6400, fQ@ # && fQ[#^2] &] (* Michael De Vlieger, Apr 12 2015 *)
PROG
(PARI) is(n) = vecmin(digits(n))==0 && vecmin(digits(n^2))==0 && vecmax(digits(n))==6 && vecmax(digits(n^2))==6
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Felix Fröhlich, Apr 05 2015
STATUS
approved