T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..1 introduced in row major order.

A205264

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally, and new values 0..1 introduced in row major order.

Terms

    a(0) =240a(1) =1814a(2) =1814a(3) =13728a(4) =26185a(5) =13728a(6) =103876a(7) =379283a(8) =379283a(9) =103876a(10) =785920a(11) =5487807a(12) =10529929a(13) =5487807a(14) =785920a(15) =5946280a(16) =79391891a(17) =291785631a(18) =291785631a(19) =79391891a(20) =5946280a(21) =44989988a(22) =1148637735a(23) =8084022743a(24) =15472955417a(25) =8084022743

External references