A153942 - OEIS

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A153942

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 4 X 4 X 4 subtriangle.

1, 2, 4, 15, 38, 236, 1250, 13966, 128542, 2461620, 40144584, 1355506385, 38359079886, 2280018933124, 113583264552803, 11849601571255761, 1037356176207581620, 189822553366119038561 (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: A007122 A005219 A153945 * A055466 A342957 A148267` `Adjacent sequences: A153939 A153940 A153941 * A153943 A153944 A153945`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 03 2009`
	STATUS	`approved`

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Last modified April 18 14:46 EDT 2021. Contains 343089 sequences. (Running on oeis4.)