id:A154051 - OEIS Search Results

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Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 5 X 5 X 5 subtriangle summing to 5.

+0
1

144, 321, 322, 328, 186, 123, 89, 49, 37, 31, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27 (list; graph; listen)

	OFFSET	`5,1`
	COMMENT	`Value 27 starts at n=15 and continues through at least n=60.`
	EXAMPLE	`Maximal zeros solution for n=15` `................2` `...............0.0` `..............0.2.0` `.............0.0.0.0` `............0.0.1.0.0` `...........0.0.1.1.0.0` `..........2.0.0.0.0.0.2` `.........0.0.0.1.1.0.0.0` `........0.2.0.0.0.0.0.2.0` `.......0.0.0.0.1.1.0.0.0.0` `......0.0.1.0.0.1.0.0.1.0.0` `.....0.0.1.1.0.0.0.0.1.1.0.0` `....2.0.0.0.0.0.2.0.0.0.0.0.2` `...0.0.0.1.1.0.0.0.0.1.1.0.0.0` `..0.2.0.0.0.0.0.2.0.0.0.0.0.2.0`
	CROSSREFS	`Sequence in context: A008436 A134341 A125841 this_sequence A030633 A034285 A151820` `Adjacent sequences: A154048 A154049 A154050 this_sequence A154052 A154053 A154054`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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

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