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A154073
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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 9.
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0
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252, 2298, 1670, 5721, 2507, 7335, 2348, 4388, 1087, 1406, 468, 952, 386, 767, 373, 848, 373, 812, 373, 848, 373, 734, 370, 848, 373, 734, 373, 848, 373, 734, 373, 848, 370, 734, 373, 848, 373, 812, 373, 848, 373, 734, 370, 848, 373, 734, 373, 848, 373, 734, 373
(list; graph; refs; listen; history; internal format)
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OFFSET
| 4,1
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EXAMPLE
| Maximal zeros solution for n=18
...................1
..................0.0
.................0.4.0
................2.0.0.2
...............0.0.3.0.0
..............2.0.1.1.0.2
.............0.2.0.2.0.2.0
............2.2.0.1.1.0.2.2
...........0.0.1.0.3.0.1.0.0
..........0.0.3.1.0.0.1.3.0.0
.........2.2.0.0.0.4.0.0.0.2.2
........2.0.0.3.1.0.0.1.3.0.0.2
.......0.2.1.0.1.0.3.0.1.0.1.2.0
......0.0.1.1.2.0.1.1.0.2.1.1.0.0
.....0.2.2.0.0.2.0.2.0.2.0.0.2.2.0
....4.0.0.1.1.2.0.1.1.0.2.1.1.0.0.4
...0.0.1.2.1.0.1.0.3.0.1.0.1.2.1.0.0
..0.2.1.1.0.0.3.1.0.0.1.3.0.0.1.1.2.0
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CROSSREFS
| Sequence in context: A184499 A154045 A172223 * A166783 A104679 A117281
Adjacent sequences: A154070 A154071 A154072 * A154074 A154075 A154076
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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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