Number of (n+1) X (4+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.
A250873
Number of (n+1) X (4+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.
Terms
- a(0) =1328a(1) =6728a(2) =31928a(3) =144248a(4) =629528a(5) =2681528a(6) =11227928a(7) =46440248a(8) =190392728a(9) =775558328a(10) =3144379928a(11) =12704328248a(12) =51198475928a(13) =205938867128a(14) =827193307928
External references
- oeis: A250873