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 A164709 A positive integer n is included if all runs of 1's in binary n are of the same length, and if there are at least two runs of 1's. 3
 5, 9, 10, 17, 18, 20, 21, 27, 33, 34, 36, 37, 40, 41, 42, 51, 54, 65, 66, 68, 69, 72, 73, 74, 80, 81, 82, 84, 85, 99, 102, 108, 119, 129, 130, 132, 133, 136, 137, 138, 144, 145, 146, 148, 149, 160, 161, 162, 164, 165, 168, 169, 170, 195, 198, 204, 216, 219, 231, 238 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Clarification: A binary number consists of "runs" completely of 1's alternating with runs completely of 0's. No two or more runs all of the same digit are adjacent. For the terms of this sequence together with those positive integers that, when written in binary, each contain only one run of 1's, see A164707. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 MATHEMATICA r1slQ[n_]:=Module[{idn=Select[Split[IntegerDigits[n, 2]], MemberQ[ #, 1]&]}, Length[ idn]>1 && Length[Union[Length/@idn]]==1]; Select[ Range[ 250], r1slQ] (* Harvey P. Dale, Sep 29 2018 *) CROSSREFS Cf. A164707. Sequence in context: A155470 A266399 A351205 * A212314 A136318 A242139 Adjacent sequences: A164706 A164707 A164708 * A164710 A164711 A164712 KEYWORD base,nonn AUTHOR Leroy Quet, Aug 23 2009 EXTENSIONS Extended by Ray Chandler, Mar 15 2010 STATUS approved

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)