T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the minimum plus the maximum equal to the lower median plus the upper median in every 2X2 subblock.

A236009

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the minimum plus the maximum equal to the lower median plus the upper median in every 2X2 subblock.

Terms

    a(0) =88a(1) =508a(2) =508a(3) =2960a(4) =4568a(5) =2960a(6) =17464a(7) =41608a(8) =41608a(9) =17464a(10) =104112a(11) =389520a(12) =587908a(13) =389520a(14) =104112a(15) =626480a(16) =3726296a(17) =8623452a(18) =8623452a(19) =3726296a(20) =626480a(21) =3800832a(22) =36383144a(23) =130105204a(24) =199639388a(25) =130105204a(26) =36383144a(27) =3800832a(28) =23225504

External references