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A165975 sqrt( binomial(4n,0) * binomial(4n,1) * ... * binomial(4n,2n-1) ) 0
1, 2, 112, 261360, 27983155200, 143829595278720000, 36441048083860298170220544, 463109968103790656729135319264000000, 298869615482782118878970689211942578421760000000 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

a(n) = (4n)!^n / A165970(n)

CROSSREFS

Sequence in context: A012528 A024342 A012525 * A051590 A091302 A042567

Adjacent sequences:  A165972 A165973 A165974 * A165976 A165977 A165978

KEYWORD

nonn

AUTHOR

Max Alekseyev (maxale(AT)gmail.com), Oct 02 2009

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Last modified February 16 20:07 EST 2012. Contains 205956 sequences.