T(n,k)=Number of nXk 0..n+k-2 arrays with upper left zero and lower right n+k-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.
A265480
T(n,k)=Number of nXk 0..n+k-2 arrays with upper left zero and lower right n+k-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =6a(5) =3a(6) =16a(7) =36a(8) =36a(9) =16a(10) =125a(11) =366a(12) =1376a(13) =366a(14) =125a(15) =1296a(16) =4900a(17) =32400a(18) =32400a(19) =4900a(20) =1296a(21) =16807a(22) =55800a(23) =498520a(24) =1211112a(25) =498520a(26) =55800a(27) =16807a(28) =262144a(29) =970225
External references
- oeis: A265480