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A154032 Number of planar triangular n X n X n nonnegative integer grids symmetric under 120 degree rotation with every similarly oriented 2 X 2 X 2 subtriangle summing to 3. 0
1, 2, 10, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3, 11, 3, 2, 12, 2, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Pattern 2 3 11 3 2 12 starts at n=5 and continues through at least n=60.

LINKS

Table of n, a(n) for n=2..60.

EXAMPLE

Maximal zeros solution for n=11

............3

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

..........2.1.2

.........0.1.1.0

........2.1.1.1.2

.......0.1.1.1.1.0

......2.1.1.1.1.1.2

.....0.1.1.1.1.1.1.0

....2.1.1.1.1.1.1.1.2

...0.1.1.1.1.1.1.1.1.0

..3.0.2.0.2.0.2.0.2.0.3

CROSSREFS

Sequence in context: A069287 A215749 A102775 * A221551 A010700 A121521

Adjacent sequences:  A154029 A154030 A154031 * A154033 A154034 A154035

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified October 18 14:11 EDT 2021. Contains 348068 sequences. (Running on oeis4.)