T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
A251228
T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements.
Terms
- a(0) =14a(1) =49a(2) =49a(3) =171a(4) =305a(5) =171a(6) =597a(7) =1892a(8) =1892a(9) =597a(10) =2084a(11) =11753a(12) =20782a(13) =11753a(14) =2084a(15) =7275a(16) =72985a(17) =228689a(18) =228689a(19) =72985a(20) =7275a(21) =25396a(22) =453273a(23) =2515011a(24) =4462968a(25) =2515011a(26) =453273a(27) =25396a(28) =88654a(29) =2814985
External references
- oeis: A251228