OFFSET
1,2
COMMENTS
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Zerofree [From Reinhard Zumkeller, Dec 01 2009]
MATHEMATICA
Select[Range[66]^2, FreeQ[IntegerDigits[#], 0]==True &] (* Jayanta Basu, May 25 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, Dec 15 1999
STATUS
approved