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A043875 Numbers n such that number of runs in the base 4 representation of n is congruent to 8 mod 10. 0

%I #9 Oct 05 2017 13:02:52

%S 17476,17478,17479,17480,17481,17483,17484,17485,17486,17505,17506,

%T 17507,17508,17510,17511,17516,17517,17518,17521,17522,17523,17524,

%U 17526,17527,17528,17529,17531,17540,17542,17543

%N Numbers n such that number of runs in the base 4 representation of n is congruent to 8 mod 10.

%C Superset of A043599. Differs from A043866 because there are numbers with 17 or 18 runs, for example. Differs from A043850 because there are numbers with 16 or 18 runs, for example. [From _R. J. Mathar_, Oct 20 2008]

%t Select[Range[18000],Mod[Length[Split[IntegerDigits[#,4]]],10]==8&] (* _Harvey P. Dale_, Oct 05 2017 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_

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Last modified July 13 20:42 EDT 2024. Contains 374288 sequences. (Running on oeis4.)