Number of (5+1) X (n+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.
A250787
Number of (5+1) X (n+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) =144a(1) =396a(2) =990a(3) =2426a(4) =5688a(5) =12950a(6) =28692a(7) =62274a(8) =132890a(9) =279864a(10) =583196a(11) =1205236a(12) =2474328a(13) =5053216a(14) =10277030a(15) =20831790a(16) =42114880a(17) =84962234a(18) =171112172a(19) =344149014a(20) =691415474a(21) =1387878796a(22) =2783929300a(23) =5581085336a(24) =11183577088a(25) =22401796180
External references
- oeis: A250787