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

A236640

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

Terms

    a(0) =81a(1) =474a(2) =474a(3) =2796a(4) =4176a(5) =2796a(6) =16588a(7) =37018a(8) =37018a(9) =16588a(10) =98368a(11) =334180a(12) =499072a(13) =334180a(14) =98368a(15) =582304a(16) =2988228a(17) =6889628a(18) =6889628a(19) =2988228a(20) =582304a(21) =3448740a(22) =26755684a(23) =93754871a(24) =148743254a(25) =93754871a(26) =26755684a(27) =3448740a(28) =20433016

External references