Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251080
Number of (n+1)X(n+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =27a(1) =284a(2) =1165a(3) =4718a(4) =14891a(5) =47932a(6) =139553a(7) =402854a(8) =1109887a(9) =3007772a(10) =7941557a(11) =20638750a(12) =52718963a(13) =132874124a(14) =330624073a(15) =813659558
External references
- oeis: A251080