1030490

Appears in sequences

• a(n) = n*(2*n^8 + 84*n^6 + 798*n^4 + 1636*n^2 + 315)/2835.at n=10A099196
• Expansion of ((1-x)/(1-2x))^10.at n=9A169797
• a(n) = (n+1)*A001003(n).at n=9A176479
• Number of paths from (0,0) to the line x = n, each segment given by a vector (1,1), (1,-1), or (2,0), not crossing the x-axis, and including no horizontal segment on the x-axis.at n=18A247623