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A154041 Number of planar triangular n X n X n nonnegative integer grids with mirror symmetry about one altitude with every similarly oriented 4 X 4 X 4 subtriangle summing to 4. +0
1
27, 96, 52, 70, 23, 27, 16, 15, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8 (list; graph; listen)
OFFSET

4,1

COMMENT

Value 8 starts at n=12 and continues through at least n=60.

EXAMPLE

Maximal zeros solution for n=12

.............2

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

...........0.2.0

..........0.0.0.0

.........0.0.2.0.0

........2.0.0.0.0.2

.......0.0.0.2.0.0.0

......0.2.0.0.0.0.2.0

.....0.0.0.0.2.0.0.0.0

....0.0.2.0.0.0.0.2.0.0

...2.0.0.0.0.2.0.0.0.0.2

..0.0.0.2.0.0.0.0.2.0.0.0

CROSSREFS

Sequence in context: A101100 A078183 A072252 this_sequence A118615 A033659 A010015

Adjacent sequences: A154038 A154039 A154040 this_sequence A154042 A154043 A154044

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Jan 04 2009

page 1

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.


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