Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

A253753

Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.

Terms

    a(0) =28107a(1) =305707a(2) =1636717a(3) =5195288a(4) =10966149a(5) =19685575a(6) =33767784a(7) =53908650a(8) =79636678a(9) =111887770a(10) =154273666a(11) =208551891a(12) =273063404a(13) =349350730a(14) =443497974a(15) =557840034a(16) =689156599a(17) =839938280a(18) =1019433332a(19) =1230639389a(20) =1468352504

External references