120127

Appears in sequences

• Numbers whose base-7 representation has exactly 7 runs.at n=18A043622
• a(2) = 0, and otherwise a(n) is the least multiple of prime(n+1) whose decimal representation ends with that of prime(n).at n=30A333577
• a(n) is the least number k such that the k-th difference between consecutive practical numbers, A179651(k), equals 2*n, or -1 if no such k exists.at n=30A364706
• Numbers k such that sigma(k) = psi(k) + tau(k) + omega(k).at n=30A386637