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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
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; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

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

LINKS

Table of n, a(n) for n=4..55.

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: A214186 A255788 A029565 * A027809 A222912 A266107

Adjacent sequences:  A154039 A154040 A154041 * A154043 A154044 A154045

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified August 11 08:05 EDT 2020. Contains 336422 sequences. (Running on oeis4.)