44596

Appears in sequences

• Number of (n+2)X(n+2) 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.at n=1A205407
• Number of (n+2)X4 0..2 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.at n=1A205409
• 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 or nw-to-se diagonally exactly two ways, and new values 0..2 introduced in row major order.at n=4A205415
• Euler transform of (0, 1, -2, 4, -8, 16, ...), (cf. A122803).at n=20A358449
• a(n) = 2 + n^2*floor((n+3)/2) + floor(3*n/2).at n=43A370754