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A215185
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Number of 5X5X5 triangular 0..n arrays with every horizontal row nondecreasing, first elements of rows nonincreasing, last elements of rows nondecreasing, and every row having the same average value
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1
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2, 17, 80, 412, 1558, 5096, 14826, 39630, 97184, 223612, 482160, 991120, 1946560, 3679402, 6713958, 11870167, 20399452, 34184289, 55959254, 89708318, 140988720, 217682282, 330552474, 494354268, 728865852, 1060428048, 1523781598
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OFFSET
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1,1
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COMMENTS
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LINKS
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EXAMPLE
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Some solutions for n=4
......2..........1..........2..........3..........3..........2..........2
.....2.2........0.2........1.3........3.3........2.4........2.2........2.2
....1.1.4......0.1.2......1.1.4......3.3.3......2.3.4......2.2.2......0.3.3
...1.1.2.4....0.1.1.2....1.1.2.4....1.3.4.4....2.3.3.4....0.1.3.4....0.2.3.3
..1.1.1.3.4..0.0.0.1.4..0.1.2.3.4..0.3.4.4.4..2.2.3.4.4..0.2.2.2.4..0.1.3.3.3
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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