T(n,k) is the half the number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.

A209951

T(n,k) is the half the number of (n+1) X (k+1) 0..2 arrays with every 2 X 2 subblock having at most one duplicate clockwise edge difference.

Terms

    a(0) =34a(1) =258a(2) =258a(3) =1956a(4) =4975a(5) =1956a(6) =14832a(7) =95794a(8) =95794a(9) =14832a(10) =112464a(11) =1845126a(12) =4681176a(13) =1845126a(14) =112464a(15) =852768a(16) =35537484a(17) =228881560a(18) =228881560a(19) =35537484a(20) =852768a(21) =6466176a(22) =684469520a(23) =11189540644a(24) =28414622976a(25) =11189540644a(26) =684469520a(27) =6466176

External references