A153947 - OEIS

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A153947

Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 6 ones in any 4 X 4 X 4 subtriangle.

1, 2, 2, 4, 11, 23, 83, 542, 2154, 15035, 184615, 1315991, 16739106, 377984235, 5010747205, 118406407922, 4950057264228, 123458500863829 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..17.`
	CROSSREFS	`Sequence in context: A072074 A052338 A153950 * A298778 A260878 A064880` `Adjacent sequences: A153944 A153945 A153946 * A153948 A153949 A153950`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 03 2009`
	STATUS	`approved`

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Last modified December 3 05:03 EST 2023. Contains 367531 sequences. (Running on oeis4.)