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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
OFFSET
4,1
COMMENTS
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: A331976 A020206 A020304 * A027574 A059047 A046149
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 2009
STATUS
approved