404090404

Appears in sequences

• Palindromic squares.at n=27A002779
• Palindromic squares with an odd number of digits.at n=25A028817
• Palindromes whose square root is a palindrome.at n=21A057136
• Squares composed of digits {0,4,9}, not ending with zero.at n=8A058444
• Palindromic perfect powers.at n=31A075786
• a(n) = A128921(n)^2.at n=23A319483
• Perfect powers m^k, m >= 1, k >= 2 such that m and m^k both are palindromes.at n=25A348429