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A154058 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 6. +0
1
77, 419, 263, 565, 252, 422, 79, 74, 15, 21, 11, 11, 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=16 and continues through at least n=60.

EXAMPLE

Maximal zeros solution for n=16

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

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

...............0.3.0

..............0.0.0.0

.............0.0.3.0.0

............3.0.0.0.0.3

...........0.0.0.3.0.0.0

..........0.3.0.0.0.0.3.0

.........0.0.0.0.3.0.0.0.0

........0.0.3.0.0.0.0.3.0.0

.......3.0.0.0.0.3.0.0.0.0.3

......0.0.0.3.0.0.0.0.3.0.0.0

.....0.3.0.0.0.0.3.0.0.0.0.3.0

....0.0.0.0.3.0.0.0.0.3.0.0.0.0

...0.0.3.0.0.0.0.3.0.0.0.0.3.0.0

..3.0.0.0.0.3.0.0.0.0.3.0.0.0.0.3

CROSSREFS

Sequence in context: A158771 A020206 A020304 this_sequence A027574 A059047 A046149

Adjacent sequences: A154055 A154056 A154057 this_sequence A154059 A154060 A154061

KEYWORD

nonn

AUTHOR

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

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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