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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

%I

%S 56,164,248,207,155,94,34,28,28,28,28,28,28,28,28,28,28,28,28,28,28,

%T 28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,

%U 28,28,28,28,28,28,28,28,28,28,28,28,28,28

%N 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.

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

%e Maximal zeros solution for n=10

%e ...........0

%e ..........0.2

%e .........1.0.0

%e ........1.0.1.0

%e .......0.0.1.1.0

%e ......0.2.0.0.0.2

%e .....1.0.0.1.1.0.0

%e ....1.0.1.0.1.0.1.0

%e ...0.0.1.1.0.0.1.1.0

%e ..0.2.0.0.0.2.0.0.0.2

%K nonn

%O 3,1

%A _R. H. Hardin_ Jan 04 2009

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Last modified January 25 23:56 EST 2022. Contains 350572 sequences. (Running on oeis4.)