430688

Appears in sequences

• Coefficients of polynomials D(n,x) related to median Euler numbers.at n=19A098277
• a(n)=numerator of the probability that (x-y)/(x+y)+(y-z)/(y+z)+(z-u)/(z+u)+ (u-x)/(u+x)>0, assuming that each random quadruple of integers (x,y,z,u), with a<=x,y,z,u<=n, is equally likely.at n=30A106199