T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order.

A204630

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..2 introduced in row major order.

Terms

    a(0) =12a(1) =96a(2) =96a(3) =768a(4) =2049a(5) =768a(6) =6144a(7) =43734a(8) =43734a(9) =6144a(10) =49152a(11) =933462a(12) =2490558a(13) =933462a(14) =49152a(15) =393216a(16) =19923888a(17) =141832254a(18) =141832254a(19) =19923888a(20) =393216a(21) =3145728a(22) =425257068a(23) =8077061502a(24) =21550390395a(25) =8077061502a(26) =425257068a(27) =3145728a(28) =25165824

External references