T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock equal.

A236798

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median plus the minimum of every 2X2 subblock equal.

Terms

    a(0) =81a(1) =255a(2) =255a(3) =825a(4) =1231a(5) =825a(6) =2817a(7) =6217a(8) =6217a(9) =2817a(10) =9717a(11) =34163a(12) =47831a(13) =34163a(14) =9717a(15) =34317a(16) =191657a(17) =420133a(18) =420133a(19) =191657a(20) =34317a(21) =122305a(22) =1116735a(23) =3722333a(24) =6154349a(25) =3722333a(26) =1116735a(27) =122305a(28) =442285a(29) =6597729

External references