id:A139046 - OEIS Search Results

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Half the number of symmetric n X n binary matrices with the center of gravity of the 1s at the center.

+0
1

1, 2, 12, 52, 1992, 43472, 8084672, 785972800, 632010796352, 260819509251776, 879345967412550400, 1508148706710022883840, 20993821611583601278837888, 147923394778079541856196475392, 8426633557858801012990635249817088 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Ron Hardin (rhhardin(AT)att.net), Jun 01 2008, Table of n, a(n) for n = 1..19`
	CROSSREFS	`Cf. A133413.` `Sequence in context: A043007 A080675 A007225 this_sequence A036359 A055703 A006738` `Adjacent sequences: A139043 A139044 A139045 this_sequence A139047 A139048 A139049`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Jun 01 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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