id:A154076 - OEIS Search Results

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Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 5 X 5 X 5 subtriangle summing to 9.

+0
1

13, 19, 34, 21, 7, 16, 7, 1, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 (list; graph; listen)

	OFFSET	`5,1`
	COMMENT	`Value 1 starts at n=15 and continues through at least n=56.`
	EXAMPLE	`Maximal zeros solution for n=15` `................1` `...............0.0` `..............1.1.1` `.............0.1.1.0` `............1.0.1.0.1` `...........1.1.0.0.1.1` `..........0.0.0.3.0.0.0` `.........1.1.1.0.0.1.1.1` `........0.1.1.0.1.0.1.1.0` `.......1.0.1.0.1.1.0.1.0.1` `......1.1.0.0.1.1.1.0.0.1.1` `.....0.0.0.3.0.0.0.0.3.0.0.0` `....1.1.1.0.0.1.1.1.0.0.1.1.1` `...0.1.1.0.1.0.1.1.0.1.0.1.1.0` `..1.0.1.0.1.1.0.1.0.1.1.0.1.0.1`
	CROSSREFS	`Sequence in context: A101408 A023252 A128342 this_sequence A088186 A089490 A057749` `Adjacent sequences: A154073 A154074 A154075 this_sequence A154077 A154078 A154079`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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