OFFSET
1,1
COMMENTS
Elements are squares of integers in (sqrt(61), sqrt(70)) * sqrt(10)^k without the leading 6 elements for nonnegative k. - David A. Corneth, May 20 2016
LINKS
Nathan Fox, Table of n, a(n) for n = 1..10000
EXAMPLE
76 is a member because 676 = 26^2 is a square.
0 is not a member because 60 is not a square.
MAPLE
t1:=[];
for k from 1 to 50000 do
if issqr(k+6*10^length(k)) then t1:=[op(t1), k]; fi;
od;
t1;
MATHEMATICA
Select[Range[31000], IntegerQ[Sqrt[FromDigits[Join[{6}, IntegerDigits[ #]]]]]&] (* Harvey P. Dale, Feb 09 2019 *)
PROG
(Magma) [n: n in [1..20000 ] | IsSquare(Seqint(Intseq(n) cat Intseq(6)))]; // Marius A. Burtea, Mar 21 2019
CROSSREFS
KEYWORD
nonn,base
AUTHOR
STATUS
approved