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A144795
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A positive integer n is included if every 1 in binary n is next to at least one other 1.
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5
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| n is included if A144790(n) >= 2.
A173024 is a subsequence. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 07 2010]
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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: [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 29 2008]
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CROSSREFS
| A144790, A144794
Cf. A004760, A173022, A005251, A173025. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Feb 07 2010]
Sequence in context: A138038 A095029 A028792 * A077459 A048717 A175332
Adjacent sequences: A144792 A144793 A144794 * A144796 A144797 A144798
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KEYWORD
| base,nonn
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AUTHOR
| Leroy Quet Sep 21 2008
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EXTENSIONS
| Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 29 2008
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