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A182614
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Least k such that floor(k/r^n)=n, where r = golden ratio = (1+sqrt(5))/2.
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2
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2, 6, 13, 28, 56, 108, 204, 376, 685, 1230, 2190, 3864, 6774, 11802, 20461, 35312, 60708, 104004, 177632, 302540, 513997, 871266, 1473818, 2488368, 4194026, 7057518, 11858509, 19898116, 33345680, 55814940, 93320820, 155867104
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n) = 2*a(n-1) + 2*a(n-2) - 4*a(n-3) - 2*a(n-4) + 2*a(n-5) + a(n-6) for n > 6.
G.f.: x*(-2*x^4 + 2*x^3 + 3*x^2 - 2*x - 2)/((x - 1)*(x + 1)*(x^2 + x - 1)^2). (End)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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