122345

Appears in sequences

• a(n) = min{p + q + r + ...} where p,q,r,... are distinct unary numbers - containing only ones, i.e., of the form (10^k - 1)/9 - formed by using a total of n ones.at n=16A110380
• Numbers k such that 3*10^k - 97 is prime.at n=26A290577
• Triangle read by rows: T(n,k) is the number of permutation graphs on n vertices with domination number k, with 1 <= k <= n.at n=48A320578