A166221 - OEIS

A166221

Number of 13X13X13 triangular nonnegative integer arrays, symmetric under 120 degree rotation, with all sums of an element and its neighbors <= n

1, 1195, 433447, 81325310, 6511049130, 283350411160, 8966527587527, 191827791698093 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..7.`
	CROSSREFS	`Sequence in context: A251923 A251916 A251915 * A096955 A113898 A059401` `Adjacent sequences: A166218 A166219 A166220 * A166222 A166223 A166224`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Oct 09 2009`
	STATUS	`approved`

Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)