id:A153917 - OEIS Search Results

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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 2 ones in any 5 X 5 X 5 subtriangle.

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1, 2, 1, 1, 2, 1, 4, 13, 18, 49, 140, 188, 406, 1769, 3341, 8622, 44447, 84993, 281707, 1724133, 3711938, 16716005, 125407513, 356014822, 1906068709, 17144172762, 59257809503, 359265884506, 3898069443043 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A050473 A057593 A117008 this_sequence A126127 A060256 A103899` `Adjacent sequences: A153914 A153915 A153916 this_sequence A153918 A153919 A153920`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 03 2009`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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