Number of (n+1) X (3+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.
A250792
Number of (n+1) X (3+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) =54a(1) =162a(2) =482a(3) =1430a(4) =4258a(5) =12706a(6) =37986a(7) =113694a(8) =340562a(9) =1020650a(10) =3059890a(11) =9175558a(12) =27518466a(13) =82538994a(14) =247584194a(15) =742687022a(16) =2227929970a(17) =6683527738a(18) =20050058898a(19) =60149128086a(20) =180445287074a(21) =541331666882
External references
- oeis: A250792