A154049 Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 4 X 4 X 4 subtriangle summing to 5.

2002, 12641, 36620, 59041, 74474, 98432, 43074, 22005, 15011, 19336, 14149, 14176, 14149, 19306, 14149, 14176, 14149, 19306, 14149, 14176, 14149, 19306, 14149, 14176, 14149, 19306, 14149, 14176, 14149, 19306, 14149, 14176, 14149, 19306, 14149, 14176

Offset

4,1

Comments

Pattern 14149 14176 14149 19306 starts at n=14 and continues through at least n=50.

Links

Table of n, a(n) for n=4..39.

Example

Maximal zeros solution for n=14
...............0
..............0.0
.............0.0.0
............2.1.0.2
...........0.0.0.2.0
..........0.1.1.0.0.0
.........0.0.1.0.1.0.0
........2.1.0.0.1.1.0.2
.......0.0.0.2.0.0.0.2.0
......0.1.1.0.0.1.1.0.0.0
.....0.0.1.0.1.0.1.0.1.0.0
....2.1.0.0.1.1.0.0.1.1.0.2
...0.0.0.2.0.0.0.2.0.0.0.2.0
..0.2.0.0.0.2.0.0.0.2.0.0.0.1

Crossrefs

Sequence in context: A162239 A104400 A250880 * A339803 A108116 A140920

Adjacent sequences: A154046 A154047 A154048 * A154050 A154051 A154052

Keyword

nonn

Author

R. H. Hardin Jan 04 2009

Status

approved