id:A154002 - OEIS Search Results

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Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 13 ones in any 5 X 5 X 5 subtriangle.

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1, 2, 2, 4, 8, 15, 30, 121, 231, 922, 3737, 14596, 58211, 469831, 1835827, 14554240, 117947573, 917117580, 7292920219, 117680064956, 918073021793, 14535229309434, 235458669342831, 3657602835082750, 58133874029508411, 1875022386576869767 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A075126 A098788 A153999 this_sequence A154005 A054243 A005864` `Adjacent sequences: A153999 A154000 A154001 this_sequence A154003 A154004 A154005`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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