5677056

Appears in sequences

• Denominators of coefficients in expansion of sqrt(sin(x)/x) (even powers only).at n=5A008992
• a(n) = 2^n*n!/(floor(n/2)!)^2.at n=11A253665
• Maximum difficulty level (see A361424 for the definition) for tiling an n X 2 rectangle with a set of integer-sided rectangles, rounded down to the nearest integer.at n=25A361426