id:A154089 - 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 13.

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10296, 64397, 161040, 382854, 515649, 859348, 1018677, 822030, 546876, 304400, 132626, 47650, 14709, 8418, 4649, 4432, 2800, 3706, 2562, 3674, 2404, 2404, 2404, 2404 (list; graph; listen)

	OFFSET	`5,1`
	COMMENT	`Value 2404 starts at n=25 and continues through at least n=28.`
	CROSSREFS	`Sequence in context: A156119 A109176 A157735 this_sequence A100502 A099746 A083438` `Adjacent sequences: A154086 A154087 A154088 this_sequence A154090 A154091 A154092`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.

AT&T Labs Research