A139671 - OEIS

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A139671

Number of n X n symmetric binary matrices with all row sums 5.

1, 76, 6912, 848932, 133948836, 26615510712, 6549149852112, 1966499966796816 (list; graph; refs; listen; history; internal format)

	OFFSET	`5,2`
	CROSSREFS	`Sequence in context: A004299 A049669 A198476 * A098606 A093276 A184290` `Adjacent sequences: A139668 A139669 A139670 * A139672 A139673 A139674`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net), Jun 12 2008`

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Last modified February 16 19:41 EST 2012. Contains 205947 sequences.