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A205824
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(3n)!/[3n*n!*(n+1)!]
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2
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1, 10, 280, 13860, 1009008, 98017920, 11972188800, 1766895530400, 306261891936000, 61040779261862400, 13761921142674432000, 3464298995338621440000, 963455812901426718720000, 293441113300834537758720000
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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Table[(3n)!/(3n*n!*(n+1)!), {n, 1, 14}]
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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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