423384

Appears in sequences

• Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=8A209228
• a(n)=n for n<=3; thereafter a(n)=a(n-1)+a(n-2)+a(n-3)+1.at n=22A213967