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0, 1, 1, 3, 5, 12, 23, 55, 114, 273, 588, 1428, 3156, 7752, 17427, 43263, 98516, 246675, 567281, 1430715, 3316521, 8414640, 19633796, 50067108, 117464424, 300830572, 709098696, 1822766520, 4313876888, 11124755664, 26421284043
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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FORMULA
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a(2n-1) = binomial(3n, n)/(2n+1) = A001764(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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STATUS
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approved
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