T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

A186488

T(n,k)=Number of (n+1)X(k+1) 0..6 arrays with every 2X2 subblock commuting with each of its horizontal and vertical 2X2 subblock neighbors.

Terms

    a(0) =2401a(1) =1169a(2) =1169a(3) =17119a(4) =2923a(5) =17119a(6) =13411a(7) =5947a(8) =5947a(9) =13411a(10) =125368a(11) =26982a(12) =122034a(13) =26982a(14) =125368a(15) =110155a(16) =48875a(17) =75899a(18) =75899a(19) =48875a(20) =110155a(21) =878507a(22) =181792a(23) =877068a(24) =464292a(25) =877068a(26) =181792a(27) =878507a(28) =868467a(29) =349085

External references