T(n,k) = Number of (n+2) X (k+2) 0..2 arrays with each 3 X 3 subblock having a positive determinant.

A186068

T(n,k) = Number of (n+2) X (k+2) 0..2 arrays with each 3 X 3 subblock having a positive determinant.

Terms

    a(0) =6396a(1) =85950a(2) =85950a(3) =1119798a(4) =2594364a(5) =1119798a(6) =14499921a(7) =73704654a(8) =73704654a(9) =14499921a(10) =189215295a(11) =1983108841a(12) =4397457795a(13) =1983108841a(14) =189215295a(15) =2464134402a(16) =56342354623a(17) =247063804348a(18) =247063804348a(19) =56342354623a(20) =2464134402

External references