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A154059
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Number of planar triangular n X n X n nonnegative integer grids with every similarly oriented 4 X 4 X 4 subtriangle summing to 6.
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0
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5005, 42379, 161481, 327971, 465436, 588412, 315265, 126740, 40993, 9833, 4891, 3523, 2084, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080, 2080
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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COMMENTS
| Value 2080 starts at n=17 and continues through at least n=50.
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EXAMPLE
| Maximal zeros solution for n=17
..................0
.................0.0
................0.0.3
...............0.3.0.0
..............3.0.0.0.0
.............0.0.0.0.3.0
............0.0.0.3.0.0.0
...........0.0.3.0.0.0.0.3
..........0.3.0.0.0.0.3.0.0
.........3.0.0.0.0.3.0.0.0.0
........0.0.0.0.3.0.0.0.0.3.0
.......0.0.0.3.0.0.0.0.3.0.0.0
......0.0.3.0.0.0.0.3.0.0.0.0.3
.....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
...0.0.0.0.3.0.0.0.0.3.0.0.0.0.3.0
..0.0.0.3.0.0.0.0.3.0.0.0.0.3.0.0.0
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CROSSREFS
| Sequence in context: A108011 A018188 A067226 * A138637 A140921 A201178
Adjacent sequences: A154056 A154057 A154058 * A154060 A154061 A154062
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KEYWORD
| nonn
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AUTHOR
| R. H. Hardin (rhhardin(AT)att.net) Jan 04 2009
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