55555551

Appears in sequences

• a(n) = A131766(n) / 18.at n=40A131871
• a(n) = (5*10^n - 41)/9 for n > 0.at n=7A173804
• Expansion of x*(1 + 5*x + 40*x^2)/((1 - x^2)*(1 - 10*x^2)).at n=15A322927