Number of (n+1) X (4+1) 0..1 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.
A250607
Number of (n+1) X (4+1) 0..1 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) =120a(1) =290a(2) =592a(3) =1126a(4) =2092a(5) =3890a(6) =7320a(7) =13982a(8) =27076a(9) =53002a(10) =104560a(11) =207350a(12) =412572a(13) =822626a(14) =1642312a(15) =3281230a(16) =6558580a(17) =13112762a(18) =26220576a(19) =52435622a(20) =104865100a(21) =209723410a(22) =419439352a(23) =838870526a(24) =1677732132a(25) =3355454570a(26) =6710898640
External references
- oeis: A250607