12055512

Appears in sequences

• Numbers n such that sigma(n) = sigma(n-1) + sigma(n-2).at n=9A065900
• Solutions k of the equation isigma(k) = isigma(k-1) + isigma(k-2) where isigma(k) is the sum of the infinitary divisors of k (A049417).at n=11A332975