212290

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n+3)*(3*n+2)/120.at n=23A051836
• Number of (n+2)X4 0..3 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..3 introduced in row major order.at n=1A204535
• T(n,k)=Number of (n+2)X(k+2) 0..3 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..3 introduced in row major order.at n=4A204538