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A188199 Base-8 Keith numbers. 1
8, 11, 15, 16, 22, 24, 32, 37, 40, 48, 56, 59, 92, 123, 200, 251, 257, 400, 457, 893, 2761, 4040, 4547, 8392, 9161, 12833, 16784, 21225, 29617, 127126, 238244, 378733, 526117, 587524, 599333, 672549, 745765, 2176234, 2347267, 2593739, 5285583, 8113400, 341785390, 449415500, 514971408 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Keith numbers are described in A007629.
LINKS
EXAMPLE
200 is here because, in base 8, 200 is 310 and applying the Keith iteration to this number produces the numbers 3, 1, 0, 4, 5, 9, 18, 32, 59, 109, 200.
MATHEMATICA
IsKeith[n_, b_] := Module[{d, s, k}, d = IntegerDigits[n, b]; s = Total[d]; k = 1; While[AppendTo[d, s]; s = 2 s - d[[k]]; s < n, k++]; s == n]; Select[Range[3, 10^5], IsKeith[#, 8]&]
CROSSREFS
Cf. A007629 (base 10), A162724 (base 2), A187713 (base 5), A188195-A188200.
Sequence in context: A101573 A029629 A028394 * A078117 A256073 A032423
KEYWORD
nonn,base
AUTHOR
T. D. Noe, Mar 24 2011
STATUS
approved

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Last modified April 24 22:16 EDT 2024. Contains 371963 sequences. (Running on oeis4.)