Number of 4 X 4 X 4 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.

A215184

Number of 4 X 4 X 4 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) =9a(2) =26a(3) =83a(4) =192a(5) =445a(6) =892a(7) =1752a(8) =3136a(9) =5494a(10) =9074a(11) =14716a(12) =22842a(13) =34868a(14) =51570a(15) =75217a(16) =106968a(17) =150289a(18) =207026a(19) =282233a(20) =378516a(21) =503027a(22) =659558a(23) =857984a(24) =1103346a(25) =1408886a(26) =1781610a(27) =2238970a(28) =2789894a(29) =3457002

External references