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%I #6 Mar 20 2013 15:27:16
%S 1023,10323,103323,1033323,10231023,10333323,102301023,103333323,
%T 1023001023,1032310323,1033333323,10230001023,10323010323,10333333323,
%U 102300001023,102310231023,103230010323,103323103323,103333333323
%N Positive integers, written in base 4, with the property that if the base-4 representation is reversed the result is three times the original number.
%C For the decimal representations of these numbers see A223078.
%Y Cf. A173951, A214927, A223078.
%K nonn,base
%O 1,1
%A _N. J. A. Sloane_, Mar 14 2013
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