A153945 - OEIS

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A153945

Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 5 ones in any 5 X 5 X 5 subtriangle.

1, 2, 4, 15, 38, 116, 499, 3634, 26242, 291832, 2965112, 51213790, 844607038, 23147940890, 598064925200, 25057845860011, 1027607776126888 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..16.`
	CROSSREFS	`Sequence in context: A181442 A007122 A005219 * A153942 A055466 A342957` `Adjacent sequences: A153942 A153943 A153944 * A153946 A153947 A153948`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 03 2009`
	STATUS	`approved`

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Last modified December 10 04:38 EST 2023. Contains 367699 sequences. (Running on oeis4.)