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A006548
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(2*n)!-Sum ((-1)^(i+1)*binomial(n,i)*2^i*(2*n-1)!,i=1..n).
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0
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0, 24, 480, 40320, 2903040, 479001600, 74724249600, 20922789888000, 5690998849536000, 2432902008176640000, 1021818843434188800000, 620448401733239439360000, 372269041039943663616000000
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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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FORMULA
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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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