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A050536
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Iterated triangular numbers with seed 8.
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10
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8, 36, 666, 222111, 24666759216, 304224505122393846936, 46276274758482720006792605816457695217516, 1070746802761292462947634762387664148872006333922794021004562705432032738124213886
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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)=8.
a(n) ~ 2 * c^(2^n), where c = 4.2726038862497240421168669075178596377687659229240586312... . - Vaclav Kotesovec, Dec 17 2014
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MATHEMATICA
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PROG
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(Haskell)
a050536 n = a050536_list !! n
(PARI) a(n)=if(n==0, 8, (a(n-1))*(a(n-1)+1)/2) \\ Edward Jiang, Sep 07 2014
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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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EXTENSIONS
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STATUS
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approved
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