145215

Appears in sequences

• Numbers n such that the perfect deficiency of n (A109883) equals the perfect deficiency of n + 1.at n=1A110018
• Solutions to abs(sigma(x+1) - sigma(x)) = 2. Divisor sums of x and its neighbor x+1 differ from each other by 2.at n=5A112645
• Number of ordered 9-tuples of distinct pairwise coprime positive integers with largest element n.at n=36A186980
• Numbers n such that floor(antisigma(n) / sigma(n)) = floor(antisigma(n+1) / sigma(n+1)).at n=20A244666
• Numbers m such that the delta(m) = abs(sigma(m+1)/(m+1) - sigma(m)/(m)) is smaller than delta(k) for all k < m.at n=34A335071