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A028250
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Sequence arising in multiprocessor page migration.
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0
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2, 5, 7, 10, 12, 15, 17, 20, 23, 25, 28, 30, 33, 35, 38, 40, 43, 46, 48, 51, 53, 56, 58, 61, 64, 66, 69, 71, 74, 76, 79, 81, 84, 87, 89, 92, 94, 97, 99, 102, 105, 107, 110, 112, 115, 117, 120, 122, 125, 128, 130, 133, 135, 138, 140, 143, 146, 148, 151, 153, 156, 158, 161, 163
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OFFSET
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1,1
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COMMENTS
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a(n) minimizes the maximum of 1+(a(n)+1)/(2*n) and 1+(2*n+(a(n)+1)/2)/a(n). In case that a(n) is not unique and the same maximum occurs more than once, take the smaller value (assuming that this is a counter value on the nodes that is better if it stays small). - R. J. Mathar, Oct 26 2017
Is this the Beatty sequence b(n) = floor(k*n) with k = (sqrt(17)+1)/2? If not, and there is some n with a(n) != b(n), then a(n) = b(n) + 1 and n > 10^8. - Charles R Greathouse IV, Jan 27 2022
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REFERENCES
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J. Westbrook, Randomized algorithms for multiprocessor page migration, in "On-Line Algorithms", DIMACS Series in Discrete Math., Vol. 7, 1992, pp. 135-149.
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LINKS
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CROSSREFS
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KEYWORD
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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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