id:A070307 - OEIS Search Results

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Number of n X n matrices with nonnegative integer entries such that every row sum equals 3.

+0
2

1, 16, 1000, 160000, 52521875, 30840979456, 29509034655744, 42998169600000000, 90647430472564453125, 265599227914240000000000, 1047192117300356121695451136, 5410240907043328777415185924096 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = C(n+2, 3)^n = A000292(n-1)^n`
	MATHEMATICA	`Table[ Binomial[n + 2, 3]^n, {n, 1, 14}]`
	CROSSREFS	`Cf. A061718, A000292.` `Sequence in context: A006089 A024301 A160012 this_sequence A159683 A067490 A130036` `Adjacent sequences: A070304 A070305 A070306 this_sequence A070308 A070309 A070310`
	KEYWORD	`nonn`
	AUTHOR	`Sharon Sela (sharonsela(AT)hotmail.com), May 10 2002`
	EXTENSIONS	`More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), May 10 2002`

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Last modified December 6 22:55 EST 2009. Contains 170429 sequences.

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