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A144795 A positive integer n is included if every 1 in binary n is next to at least one other 1. 5
3, 6, 7, 12, 14, 15, 24, 27, 28, 30, 31, 48, 51, 54, 55, 56, 59, 60, 62, 63, 96, 99, 102, 103, 108, 110, 111, 112, 115, 118, 119, 120, 123, 124, 126, 127, 192, 195, 198, 199, 204, 206, 207, 216, 219, 220, 222, 223, 224, 227, 230, 231, 236, 238, 239, 240, 243, 246 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

n is included if A144790(n) >= 2.

A173024 is a subsequence. - Reinhard Zumkeller, Feb 07 2010

LINKS

Table of n, a(n) for n=1..58.

MAPLE

isA144795 := proc(n) local bind, i ; bind := convert(n, base, 2) ; for i from 1 to nops(bind) do if i = 1 then if op(i, bind) = 1 and op(i+1, bind) = 0 then RETURN(false) : fi; elif i = nops(bind) then if op(i, bind) = 1 and op(i-1, bind) = 0 then RETURN(false) : fi; else if op(i, bind) = 1 and op(i-1, bind) = 0 and op(i+1, bind) = 0 then RETURN(false) : fi; fi; od: RETURN(true) ; end: for n from 3 to 400 do if isA144795(n) then printf("%d, ", n) ; fi; od: # R. J. Mathar, Sep 29 2008

CROSSREFS

Cf. A144790, A144794.

Cf. A004760, A173022, A005251, A173025. - Reinhard Zumkeller, Feb 07 2010

Sequence in context: A138038 A095029 A028792 * A077459 A048717 A175332

Adjacent sequences:  A144792 A144793 A144794 * A144796 A144797 A144798

KEYWORD

base,nonn

AUTHOR

Leroy Quet, Sep 21 2008

EXTENSIONS

Extended by R. J. Mathar, Sep 29 2008

STATUS

approved

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Last modified June 27 11:25 EDT 2017. Contains 288788 sequences.