-705432

Appears in sequences

• Expansion of (1-4*x)^(21/2).at n=11A020933
• Expansion of (1-4*x)^(21/2).at n=22A020933
• Expansion of (1+x)/sqrt(1+4x^2).at n=22A128057
• Expansion of (1+x)/sqrt(1+4x^2).at n=23A128057
• Smallest Euler characteristic of a downset on an n-dimensional cube.at n=22A214283