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%I #8 Aug 22 2021 22:36:24
%S 27,45,76,94,125,143,174,189,223,241,272,290,315,339,370,388,419,437,
%T 468,486,517,532,566,584,615,633,658,682,713,731,762,780,811,829,860,
%U 875,909,927,958,976,1001,1025,1056,1074,1105
%N Numbers k such that 3 and 6 occur juxtaposed in the base-7 representation of k but not of k-1.
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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