A215185 - OEIS

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A215185

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

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Row 5 of A215182

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..147

EXAMPLE

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