9994999

Appears in sequences

• Largest n-digit palindromic multiple of n. For n = 10k it is sufficient that the multiple is palindromic with leading zeros ignored. 0 if no such number exists.at n=6A084015
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 9.at n=37A136858
• a(n) = 10^(2*n+1) - 1 - 5*10^n.at n=3A332194