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A154042 Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 4 X 4 X 4 subtriangle summing to 4. +0
1
715, 3278, 7090, 8188, 5593, 4377, 1618, 601, 228, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220, 220 (list; graph; listen)
OFFSET

4,1

COMMENT

Value 220 starts at n=13 and continues through at least n=60.

EXAMPLE

Maximal zeros solution for n=13

..............0

.............0.0

............0.0.2

...........0.2.0.0

..........2.0.0.0.0

.........0.0.0.0.2.0

........0.0.0.2.0.0.0

.......0.0.2.0.0.0.0.2

......0.2.0.0.0.0.2.0.0

.....2.0.0.0.0.2.0.0.0.0

....0.0.0.0.2.0.0.0.0.2.0

...0.0.0.2.0.0.0.0.2.0.0.0

..0.0.2.0.0.0.0.2.0.0.0.0.2

CROSSREFS

Sequence in context: A166829 A005467 A029565 this_sequence A027809 A030537 A140919

Adjacent sequences: A154039 A154040 A154041 this_sequence A154043 A154044 A154045

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 04 2009

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.


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