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A068409
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a(n) = binomial(binomial(2*n,n),n).
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1
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1, 2, 15, 1140, 916895, 8137369800, 850423134076516, 1105964895591808388136, 18627853605123584223921210120, 4180709311038401636820646431913319660, 12767818425644517198178541333546326811326975100
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OFFSET
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0,2
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LINKS
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MAPLE
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f:= n -> binomial(binomial(2*n, n), n):
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PROG
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(PARI) a(n)=binomial(binomial(2*n, n), 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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EXTENSIONS
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STATUS
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approved
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