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.

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.

Terms

    a(0) =2a(1) =17a(2) =80a(3) =412a(4) =1558a(5) =5096a(6) =14826a(7) =39630a(8) =97184a(9) =223612a(10) =482160a(11) =991120a(12) =1946560a(13) =3679402a(14) =6713958a(15) =11870167a(16) =20399452a(17) =34184289a(18) =55959254a(19) =89708318a(20) =140988720a(21) =217682282a(22) =330552474a(23) =494354268a(24) =728865852a(25) =1060428048a(26) =1523781598

External references