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A013589
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a(n+1) = a(n)*(a(n)+1)/2.
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8
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4, 10, 55, 1540, 1186570, 703974775735, 247790242435923759782980, 30700002123226936025189367747945843590228731690, 471245065183069190019624521318729501785547966685566656416776916445985874756815447988119493895
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) ~ 2 * c^(2^n), where c = 2.29524458756644851072790131811443639562180382439442714497... . - Vaclav Kotesovec, Dec 17 2014
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MAPLE
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f := proc(n) options remember; if n = 0 then 4 else 1/2*f(n-1)*(f(n-1)+1) fi end
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MATHEMATICA
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PROG
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(Haskell)
a013589 n = a013589_list !! n
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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Carl Bellinger (carlb(AT)ctron.com)
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EXTENSIONS
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STATUS
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approved
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