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A154808
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Numbers such that every run length in base 2 is 5.
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3
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31, 992, 31775, 1016800, 32537631, 1041204192, 33318534175, 1066193093600, 34118178995231, 1091781727847392, 34937015291116575, 1117984489315730400, 35775503658103372831, 1144816117059307930592, 36634115745897853778975
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OFFSET
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1,1
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COMMENTS
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a(n) is the number whose binary representation is A154807(n).
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LINKS
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FORMULA
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Conjecture: a(n) = (-33-31*(-1)^n+2^(6+5*n))/66. g.f.: 31*x / ((x-1)*(x+1)*(32*x-1)). - Colin Barker, Sep 16 2013
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MATHEMATICA
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FromDigits[#, 2]&/@Table[PadRight[{}, 5n, {1, 1, 1, 1, 1, 0, 0, 0, 0, 0}], {n, 20}] (* or *) LinearRecurrence[{32, 1, -32}, {31, 992, 31775}, 20] (* Harvey P. Dale, May 08 2016 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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