988889

Appears in sequences

• a(1)=10; a(n) = a(n-1)*10 - 1.at n=5A179555
• Number of (n+2) X 5 0..1 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..1 introduced in row major order.at n=24A204376