109911

Appears in sequences

• Smallest number appearing exactly n times in the concatenation of all integers from 1 to itself.at n=7A176779
• a(n) = Sum_{k=0..n} (-1)^k * (3*k+1) * binomial(5*n-2*k+1,n-k)/(5*n-2*k+1).at n=7A390743