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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)



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), http://www.mat.uc.pt/preprints/ps/pre1125.ps.

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; http://www.springerlink.com/content/97618878447631j8/

B. D. McKay, 0-1 matrices with constant row and column sums

Wikipedia, Dynamic programming


A diagonal of triangle in A008300. Cf. A001499, A001501.

Sequence in context: A212301 A226339 A157064 * A138583 A193747 A024240

Adjacent sequences:  A058524 A058525 A058526 * A058528 A058529 A058530




David desJardins (david(AT)desjardins.org), Dec 22 2000


More terms (using dynamic programming in Python) from Greg Kuperberg (greg(AT)math.ucdavis.edu), Feb 08 2001

More terms from Vladeta Jovovic, Nov 12 2006



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Last modified April 24 04:07 EDT 2014. Contains 240947 sequences.