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A230664
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a(n) = floor(3^n/n^2).
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2
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3, 2, 3, 5, 9, 20, 44, 102, 243, 590, 1464, 3690, 9433, 24402, 63772, 168151, 446851, 1195742, 3219560, 8716961, 23719621, 64836900, 177964421, 490329056, 1355661775, 3760156550, 10460353203, 29179582212, 81605680576, 228767924549, 642740266684, 1809590028175
(list;
graph;
refs;
listen;
history;
text;
internal format)
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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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MATHEMATICA
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PROG
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(Python)
for n in range(1, 100): print str(3**n // n**2)+', ',
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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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