Number of (n+1) X (5+1) 0..1 arrays with nondecreasing 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.
A250780
Number of (n+1) X (5+1) 0..1 arrays with nondecreasing 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) =209a(1) =518a(2) =1194a(3) =2640a(4) =5688a(5) =12036a(6) =25126a(7) =51904a(8) =106344a(9) =216500a(10) =438614a(11) =885336a(12) =1782168a(13) =3580356a(14) =7182678a(15) =14395024a(16) =28829560a(17) =57711060a(18) =115489574a(19) =231065768a(20) =462241608a(21) =924621732a(22) =1849416198a(23) =3699045984a(24) =7398353992a(25) =14797027060
External references
- oeis: A250780