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a(n) = largest number with n+1 digits and without zero digits whose squares have maximal number of zero digits = A135215(n+1).
4
%I #3 Mar 31 2012 10:22:05
%S 99,949,9798,62498,997998,6244998
%N a(n) = largest number with n+1 digits and without zero digits whose squares have maximal number of zero digits = A135215(n+1).
%Y Cf. A134843, A134844, A134845, A134846, A134847, A134848, A134849, A135215, A135216, A135217.
%K nonn,base
%O 2,1
%A _Artur Jasinski_, Nov 23 2007