A153912 - OEIS

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A153912

Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 3 X 3 X 3 subtriangle.

1, 2, 28586, 195384, 2093119, 20428045, 317866834, 4492197059, 100898111116, 2073132268053, 67489432729042, 2005814360075163, 94662265499676795, 4075394325398277635, 278524123602639198495, 17377022786797473216927 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..15.`
	CROSSREFS	`Sequence in context: A132942 A131558 A133857 * A047076 A176721 A030462` `Adjacent sequences: A153909 A153910 A153911 * A153913 A153914 A153915`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin Jan 03 2009`
	STATUS	`approved`

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Last modified May 24 06:29 EDT 2013. Contains 225617 sequences.