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

A232352

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

Terms

    a(0) =21a(1) =207a(2) =207a(3) =1461a(4) =5309a(5) =1461a(6) =10503a(7) =111607a(8) =111607a(9) =10503a(10) =77613a(11) =2435979a(12) =6753291a(13) =2435979a(14) =77613a(15) =575087a(16) =53921761a(17) =426813751a(18) =426813751a(19) =53921761a(20) =575087a(21) =4251717a(22) =1191667231a(23) =27382170933a(24) =78572361735a(25) =27382170933

External references