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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; internal format)
OFFSET

3,1

COMMENTS

Value 28 starts at n=10 and continues through at least n=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: A038850 A044388 A044769 * A115620 A136547 A200833

Adjacent sequences:  A154031 A154032 A154033 * A154035 A154036 A154037

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Jan 04 2009

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Last modified February 17 23:40 EST 2012. Contains 206085 sequences.