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 A058527 Number of 2n X 2n 0-1 matrices with n ones in each row and each column. 3
 1, 2, 90, 297200, 116963796250, 6736218287430460752, 64051375889927380035549804336, 108738182111446498614705217754614976371200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS A diagonal of triangle in A008300. LINKS Vladeta Jovovic, Nov 12 2006, Table of n, a(n) for n = 0..15 A Conflitti, C. M. Da Fonseca, R. Mamede, The maximal length of a chain in the Bruhat order for a chain of binary matrices., Lin. Algebra Applic. (2011) Alessandro Conflitti, C. M. da Fonseca and Ricardo Mamede, On the largest size of an antichain in the Bruhat order for A(2k, k). Alessandro Conflitti, C. M. da Fonseca and Ricardo Mamede, On the Largest Size of an Antichain in the Bruhat Order for A(2k,k), ORDER, 2011, DOI: 10.1007/s11083-011-9241-1. M. A. Khojastepour, M. Farajzadeh-Tehrani, Characterizing per Node Degrees of Freedom in an Interference Network, 2014. B. D. McKay, 0-1 matrices with constant row and column sums Wikipedia, Dynamic programming CROSSREFS Cf. A001499, A001501, A253316. Cf. A008300. Sequence in context: A212301 A226339 A157064 * A138583 A193747 A242176 Adjacent sequences:  A058524 A058525 A058526 * A058528 A058529 A058530 KEYWORD nonn AUTHOR David desJardins (david(AT)desjardins.org), Dec 22 2000 EXTENSIONS More terms (using dynamic programming in Python) from Greg Kuperberg, Feb 08 2001 More terms from Vladeta Jovovic, Nov 12 2006 STATUS approved

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Last modified December 16 03:17 EST 2018. Contains 318158 sequences. (Running on oeis4.)