Number of (7+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
A250789
Number of (7+1) X (n+1) 0..1 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.
Terms
- a(0) =576a(1) =1596a(2) =4054a(3) =10306a(4) =25126a(5) =59590a(6) =137082a(7) =307762a(8) =676266a(9) =1460260a(10) =3107536a(11) =6535280a(12) =13611742a(13) =28129720a(14) =57764876a(15) =118015794a(16) =240116940a(17) =486922786a(18) =984765176a(19) =1987317314a(20) =4003558184a(21) =8054089024a(22) =16184388422a(23) =32492334224
External references
- oeis: A250789