T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..2 introduced in row major order.

A204954

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly two different ways, and new values 0..2 introduced in row major order.

Terms

    a(0) =506a(1) =4041a(2) =4041a(3) =33785a(4) =41353a(5) =33785a(6) =242852a(7) =457852a(8) =457852a(9) =242852a(10) =1834500a(11) =4566666a(12) =7062216a(13) =4566666a(14) =1834500a(15) =14289768a(16) =48128792a(17) =94983268a(18) =94983268a(19) =48128792a(20) =14289768a(21) =108053748a(22) =523821125a(23) =1407027760a(24) =1616210763a(25) =1407027760

External references