id:A153982 - OEIS Search Results

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Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with every one adjacent to exactly 1 other one.

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1

1, 1, 1, 1, 3, 6, 11, 30, 72, 201, 747, 2553, 10966, 58566, 287270, 1751705, 13247679, 91522060, 788765512, 8490555128, 84280981845, 1040689637617, 15976611935513, 225667587813248, 3966856029530488, 86787076062074170, 1745622351406501121 (list; graph; listen)

	OFFSET	`0,5`
	CROSSREFS	`Sequence in context: A000998 A109781 A101958 this_sequence A119367 A079801 A119104` `Adjacent sequences: A153979 A153980 A153981 this_sequence A153983 A153984 A153985`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

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