8888888889

Appears in sequences

• Number of zeros in numbers 1 to 999..9 (n digits).at n=9A033713
• a(0)=1, a(n) = a(n-1) + 8*10^(n-1).at n=10A059482
• Numbers n such that the sum of all numbers formed by deleting one digit from n is equal to n.at n=28A131639
• a(n) = n^n - A002275(n).at n=9A177009
• a(n) = n^n-n^(n-1)-n^(n-2)-...-n^2-n-1.at n=9A191690
• a(n) = decimal expansion of (n-1) prepended n times to the decimal expansion of n (n > 0).at n=8A267327
• Expansion of (1 + 4*x - 6*x^2) / ((1 - x) * (1 - 10*x^2)).at n=20A328333
• Kaprekar numbers that are the concatenation of two consecutive numbers.at n=18A381918