Number of nX3 0..n+3-2 arrays with upper left zero and lower right n+3-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.
A265475
Number of nX3 0..n+3-2 arrays with upper left zero and lower right n+3-2 and each element differing from its diagonal and antidiagonal neighbors by one or two.
Terms
- a(0) =3a(1) =36a(2) =1376a(3) =32400a(4) =498520a(5) =26904969a(6) =316565600a(7) =26305920481a(8) =304772051268
External references
- oeis: A265475