Number of (2+1) X (n+1) 0..1 arrays with nondecreasing min(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.
A250799
Number of (2+1) X (n+1) 0..1 arrays with nondecreasing min(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) =24a(1) =66a(2) =162a(3) =376a(4) =838a(5) =1818a(6) =3868a(7) =8114a(8) =16842a(9) =34680a(10) =70974a(11) =144562a(12) =293356a(13) =593562a(14) =1198210a(15) =2414360a(16) =4857750a(17) =9762474a(18) =19600956a(19) =39324898a(20) =78848794a(21) =158019576a(22) =316560142a(23) =633963266a(24) =1269290508a(25) =2540787978a(26) =5085146898a(27) =10176071704
External references
- oeis: A250799