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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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)