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A154034 Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 3 X 3 X 3 subtriangle summing to 3. 0
56, 164, 248, 207, 155, 94, 34, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

COMMENTS

Value 28 starts at n=10 and continues through at least n=60.

LINKS

Table of n, a(n) for n=3..60.

EXAMPLE

Maximal zeros solution for n=10

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

..........0.2

.........1.0.0

........1.0.1.0

.......0.0.1.1.0

......0.2.0.0.0.2

.....1.0.0.1.1.0.0

....1.0.1.0.1.0.1.0

...0.0.1.1.0.0.1.1.0

..0.2.0.0.0.2.0.0.0.2

CROSSREFS

Sequence in context: A220008 A044388 A044769 * A225324 A225358 A115620

Adjacent sequences:  A154031 A154032 A154033 * A154035 A154036 A154037

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified December 6 13:45 EST 2021. Contains 349563 sequences. (Running on oeis4.)