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Search: id:A076883
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| A076883 |
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Let u(0)=1, u(n) = 5/2 * floor(u(n-1)); then a(n) = (2/5)*u(n). |
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2
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| 1, 2, 5, 12, 30, 75, 187, 467, 1167, 2917, 7292, 18230, 45575, 113937, 284842, 712105, 1780262, 4450655, 11126637, 27816592, 69541480, 173853700, 434634250, 1086585625, 2716464062, 6791160155, 16977900387, 42444750967, 106111877417
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OFFSET
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1,2
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COMMENT
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May be equivalently defined by (1) a(n) = floor(u(n-1)) or (2) a(1) = 1, a(n) = floor(5/2 * a(n - 1)). - Joel Brewster Lewis (jblewis(AT)post.harvard.edu), Jul 18 2008
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FORMULA
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a(n)=ceiling(c*(5/2)^n) with c=0.76461665854988933665808275090184088890217299...
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CROSSREFS
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Sequence in context: A033482 A054341 A000106 this_sequence A026580 A092247 A108360
Adjacent sequences: A076880 A076881 A076882 this_sequence A076884 A076885 A076886
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KEYWORD
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nonn
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AUTHOR
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Benoit Cloitre (benoit7848c(AT)orange.fr), Nov 25 2002
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