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A048760
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Largest square <= n.
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48
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0, 1, 1, 1, 4, 4, 4, 4, 4, 9, 9, 9, 9, 9, 9, 9, 16, 16, 16, 16, 16, 16, 16, 16, 16, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 49, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,5
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LINKS
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FORMULA
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n^2 repeated (2n+1) times, n=0,1,... - Zak Seidov, Oct 25 2008
Sum_{n>=1} 1/a(n)^2 = 2*zeta(3) + Pi^4/90. - Amiram Eldar, Aug 15 2022
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MAPLE
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floor(sqrt(n)) ;
%^2 ;
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MATHEMATICA
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PROG
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(Haskell)
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CROSSREFS
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KEYWORD
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AUTHOR
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Charles T. Le (charlestle(AT)yahoo.com)
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STATUS
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approved
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