-167960

Appears in sequences

• Triangle read by rows: alternating binomial coefficients with signs.at n=45A156290
• Expansion of (1 + 2*x)*(1 + sqrt(1+4*x))/(2*sqrt(1+4*x)).at n=11A158500
• Smallest Euler characteristic of a downset on an n-dimensional cube.at n=20A214283