A154063 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 7.

112, 744, 469, 1180, 477, 951, 243, 382, 84, 154, 57, 136, 68, 106, 56, 136, 56, 136, 56, 136, 56, 106, 68, 136, 56, 106, 56, 136, 56, 106, 56, 136, 68, 106, 56, 136, 56, 136, 56, 136, 56, 106, 68, 136, 56, 106, 56, 136, 56, 106, 56, 136, 68, 106, 56, 136, 56

Offset

4,1

Links

Table of n, a(n) for n=4..60.

Example

Maximal zeros solution for n=15
................0
...............0.0
..............0.3.0
.............2.0.0.2
............0.0.2.0.0
...........1.0.1.1.0.1
..........0.2.0.1.0.2.0
.........2.1.0.1.1.0.1.2
........0.0.1.0.2.0.1.0.0
.......0.0.2.1.0.0.1.2.0.0
......1.2.0.0.0.3.0.0.0.2.1
.....2.0.0.2.1.0.0.1.2.0.0.2
....0.1.1.0.1.0.2.0.1.0.1.1.0
...0.0.1.1.1.0.1.1.0.1.1.1.0.0
..0.0.1.2.0.0.0.3.0.0.0.2.1.0.0

Crossrefs

Sequence in context: A221798 A340574 A189544 * A205250 A047631 A264891

Adjacent sequences: A154060 A154061 A154062 * A154064 A154065 A154066

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved