OFFSET
1,3
LINKS
Zak Seidov and Michael De Vlieger, Table of n, a(n) for n = 1..10471, a(n) < 25,000 (First 1057 terms from Zak Seidov)
EXAMPLE
10 is absent because 10^2=100 with repeating 0,
12 is absent because 12^2=144 with repeating 4,
21 is absent because 21^2=441 with repeating 4.
MATHEMATICA
Select[Range[0, 97], FreeQ[Differences[IntegerDigits[#^2]], 0]&] (* Jayanta Basu, May 31 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Sep 15 1999
EXTENSIONS
Edited by N. J. A. Sloane, Mar 16 2008
STATUS
approved