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%I #5 Mar 30 2012 18:56:46
%S 61,142,223,304,385,466,547,557,628,709,790,871,952,1033,1114,1195,
%T 1276,1286,1357,1438,1519,1600,1681,1762,1843,1924,2005,2015,2086,
%U 2167,2248,2329,2410,2491,2572,2653,2734,2744,2815
%N Numbers n such that string 6,7 occurs in the base 9 representation of n but not of n+1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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