A154060 - OEIS

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A154060

Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 5 X 5 X 5 subtriangle summing to 6.

15, 48, 136, 132, 79, 180, 173, 60, 137, 52, 50, 22, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48, 48, 48, 20, 48, 48 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`5,1`
	COMMENTS	`Pattern 48 48 48 48 20 starts at n=17 and continues through at least n=53.`
	LINKS	`Table of n, a(n) for n=5..53.`
	CROSSREFS	`Sequence in context: A000813 A156205 A065906 * A168305 A208155 A228219` `Adjacent sequences: A154057 A154058 A154059 * A154061 A154062 A154063`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 04 2009`
	STATUS	`approved`

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Last modified March 26 04:58 EDT 2023. Contains 361529 sequences. (Running on oeis4.)