Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.

A252598

Number of (n+2)X(1+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 2 or 5.

Terms

    a(0) =303a(1) =567a(2) =1218a(3) =2792a(4) =6709a(5) =16123a(6) =39372a(7) =97138a(8) =239542a(9) =594231a(10) =1478086a(11) =3673617a(12) =9149192a(13) =22806844a(14) =56828222a(15) =141709958a(16) =353502123a(17) =881648042a(18) =2199536221a(19) =5488280380a(20) =13693103367a(21) =34168135962a(22) =85265526852a(23) =212769328749

External references