T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements.
A251201
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements.
Terms
- a(0) =10a(1) =25a(2) =25a(3) =64a(4) =86a(5) =64a(6) =164a(7) =310a(8) =310a(9) =164a(10) =421a(11) =1135a(12) =1654a(13) =1135a(14) =421a(15) =1081a(16) =4172a(17) =8976a(18) =8976a(19) =4172a(20) =1081a(21) =2776a(22) =15353a(23) =49104a(24) =73170a(25) =49104a(26) =15353a(27) =2776a(28) =7129a(29) =56519
External references
- oeis: A251201