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A050542
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Iterated triangular numbers with seed 5.
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9
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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) = binomial(a(n-1)+1, 2), a(0)=5.
a(n) ~ 2 * c^(2^n), where c = 2.786070277619247476352890606543375642991890742669788965024... . - Vaclav Kotesovec, Dec 17 2014
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MATHEMATICA
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PROG
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(Haskell)
a050542 n = a050542_list !! n
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CROSSREFS
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KEYWORD
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easy,nice,nonn
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AUTHOR
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Klaus Strassburger (strass(AT)ddfi.uni-duesseldorf.de), Dec 29 1999
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STATUS
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approved
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