55155

Appears in sequences

• Numbers having four 5's in base 10.at n=11A043512
• Numbers n which in decimal have the form imj, where m is the middle digit, with property that j is the reversal of i, and i = m*j.at n=13A082945
• Smallest palindromic multiple of n in which the digit string of n appears as sandwiched between at least a pair of digits, or 0 if n = 10k or no such number exists.at n=14A084043
• Palindromes in base 10 that are also palindromes in base 60.at n=15A262069
• Number of symmetrical fountains of n coins.at n=42A288005
• a(n) = 5*(10^(2*n+1) - 1)/9 - 4*10^n.at n=2A332151