id:A140990 - OEIS Search Results

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Half the number of n X n binary matrices having equal row sums.

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1, 3, 28, 905, 103126, 43437282, 66141208960, 385335180349569, 8212830157184175946, 683805150345009276656138, 209730232681034628698652412600, 254785524744054762580308183579130562 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Jul 28 2008, Table of n, a(n) for n = 1..25`
	CROSSREFS	`Sequence in context: A110259 A015474 A053601 this_sequence A122891 A119156 A096621` `Adjacent sequences: A140987 A140988 A140989 this_sequence A140991 A140992 A140993`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Jul 28 2008`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

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