252474

Appears in sequences

• a(n) is the starting position of the second occurrence of a string of the initial n decimal digits of e in the decimal expansion of e.at n=5A166028
• a(n) is the largest integer k such that sigma(k)/(d(k)*sopf(k)) = n where d=A000005, sigma=A000203 and sopf=A008472.at n=21A328175