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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
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; refs; listen; history; text; internal format)
OFFSET

4,1

COMMENTS

Value 8 starts at n=16 and continues through at least n=60.

LINKS

Table of n, a(n) for n=4..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: A331976 A020206 A020304 * A027574 A059047 A046149

Adjacent sequences:  A154055 A154056 A154057 * A154059 A154060 A154061

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 04 2009

STATUS

approved

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Last modified January 22 10:40 EST 2021. Contains 340362 sequences. (Running on oeis4.)