223768

Appears in sequences

• Expansion of (1-x)/(1+x+x^2-2*x^3).at n=28A078045
• Row 3 of rectangular table A124460.at n=9A124463
• Number of (n+1) X (2+1) 0..2 arrays with the upper median of every 2 X 2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=10A237631