T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements.
A251451
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the minimum of its diagonal elements less than the absolute difference of its antidiagonal elements.
Terms
- a(0) =45a(1) =230a(2) =230a(3) =1223a(4) =2429a(5) =1223a(6) =6505a(7) =26633a(8) =26633a(9) =6505a(10) =34674a(11) =295339a(12) =618813a(13) =295339a(14) =34674a(15) =184818a(16) =3275490a(17) =14434472a(18) =14434472a(19) =3275490a(20) =184818a(21) =985223a(22) =36343085a(23) =337561156a(24) =711649307a(25) =337561156a(26) =36343085a(27) =985223a(28) =5251978
External references
- oeis: A251451