T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.
A251402
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.
Terms
- a(0) =226a(1) =3205a(2) =3205a(3) =45542a(4) =165498a(5) =45542a(6) =647154a(7) =8558283a(8) =8558283a(9) =647154a(10) =9195809a(11) =442476530a(12) =1606734480a(13) =442476530a(14) =9195809a(15) =130668665a(16) =22875877611a(17) =301644677965a(18) =301644677965a(19) =22875877611a(20) =130668665a(21) =1856748750
External references
- oeis: A251402