Number of (n+1)X(1+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor.

A232197

Number of (n+1)X(1+1) 0..2 arrays with every element both >= and <= some horizontal, vertical or antidiagonal neighbor.

Terms

    a(0) =15a(1) =109a(2) =685a(3) =4483a(4) =29469a(5) =193531a(6) =1270657a(7) =8343063a(8) =54780825a(9) =359691769a(10) =2361740413a(11) =15507217849a(12) =101820594071a(13) =668555339287

External references