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%I #8 Aug 23 2021 21:18:02
%S 13,31,113,130,213,231,310,331,413,431,513,531,613,631,713,731,813,
%T 831,913,931,1013,1031,1113,1130,1213,1231,1300,1413,1431,1513,1531,
%U 1613,1631,1713,1731,1813,1831,1913,1931,2013,2031
%N Numbers k such that 1 and 3 occur juxtaposed in the base-10 representation of k but not of k-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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