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A043696 Numbers whose base-7 representation has an even number of runs. 3
7, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 49, 56, 58, 59, 60, 61, 62, 65, 73, 81, 89, 97, 98, 106, 112, 113, 115, 116, 117, 118, 122, 130 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
Select[Range[200], EvenQ[Length[Split[IntegerDigits[#, 7]]]]&] (* Harvey P. Dale, Nov 17 2013 *)
CROSSREFS
Sequence in context: A112954 A031952 A043617 * A043397 A008536 A031000
KEYWORD
nonn,base
AUTHOR
STATUS
approved

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Last modified July 20 06:45 EDT 2024. Contains 374441 sequences. (Running on oeis4.)