Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
A250701
Number of (n+1)X(2+1) 0..3 arrays with nondecreasing x(i,j)+x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.
Terms
- a(0) =654a(1) =4958a(2) =30719a(3) =160486a(4) =735523a(5) =3020711a(6) =11354082a(7) =39603227a(8) =129764854a(9) =403049071a(10) =1195876182a(11) =3410274979a(12) =9395374116a(13) =25113321720a(14) =65362902075a(15) =166156830176a(16) =413619900804
External references
- oeis: A250701