id:A154075 - 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 9.

+0
1

1650, 6592, 10881, 16801, 14513, 14220, 11083, 6900, 3475, 1606, 588, 460, 253, 244, 241, 240, 300, 240, 240, 240, 240, 300, 240, 240, 240, 240, 300, 240, 240, 240, 240, 300, 240, 240, 240, 240, 300, 240, 240, 240, 240, 300, 240, 240, 240, 240, 300, 240, 240 (list; graph; listen)

	OFFSET	`5,1`
	COMMENT	`Pattern 240 300 240 240 240 starts at n=20 and continues through at least n=53.`
	CROSSREFS	`Sequence in context: A015340 A135016 A093059 this_sequence A054809 A163273 A104019` `Adjacent sequences: A154072 A154073 A154074 this_sequence A154076 A154077 A154078`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net) Jan 04 2009`

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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.

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