555551

Appears in sequences

• a(n) = 1 + 111110*n.at n=5A135403
• Numbers such that each decimal digit d (for all d in the range 1 <= d <= 9) occurs only in runs of length exactly d.at n=28A140057
• a(n) = (5*10^n - 41)/9 for n > 0.at n=5A173804
• For k in {2,3,...,9} define a sequence as follows: a(0)=0; for n>=0, a(n+1)=a(n)+1, unless a(n) ends in k, in which case a(n+1) is obtained by replacing the last digit of a(n) with the digit(s) of k^2. This is k(7).at n=46A237344
• a(n) = G_n(6), where G is the Goodstein function defined in A266201.at n=8A266205
• G_8(n), where G is the Goodstein function defined in A266201.at n=3A271979
• Expansion of x*(1 + 5*x + 40*x^2)/((1 - x^2)*(1 - 10*x^2)).at n=11A322927