Number of (n+2) X (1+2) 0..2 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.

A252945

Number of (n+2) X (1+2) 0..2 arrays with every consecutive three elements in every row, column and nw-se diagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.

Terms

    a(0) =198a(1) =747a(2) =2970a(3) =11943a(4) =48024a(5) =193059a(6) =776160a(7) =3120579a(8) =12546540a(9) =50444415a(10) =202816008a(11) =815438907a(12) =3278541276a(13) =13181653431a(14) =52997956416a(15) =213082782147a(16) =856717412004

External references