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

A236987

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

Terms

    a(0) =256a(1) =888a(2) =888a(3) =3000a(4) =3852a(5) =3000a(6) =11388a(7) =16212a(8) =16212a(9) =11388a(10) =43096a(11) =85064a(12) =78976a(13) =85064a(14) =43096a(15) =171036a(16) =429108a(17) =556322a(18) =556322a(19) =429108a(20) =171036a(21) =680872a(22) =2380742a(23) =3448154a(24) =6304776a(25) =3448154a(26) =2380742a(27) =680872a(28) =2770540a(29) =12891190

External references