118902

Appears in sequences

• Draw a line through every pair of points with coordinates (x, 1) and (x', 2) with x, x' in 1..n, and then count the number of intersection points above the line y = 2.at n=36A092275
• Numbers n whose sum of divisors equals the sum of divisors of 2n+1.at n=28A272553
• Numbers n such that usigma(n) = usigma(2*n+1) where usigma(n) = A034448(n).at n=14A286837