656565

Appears in sequences

• Nonpalindromic numbers m such that the difference between the square of m and the square of the reversal of m is itself a perfect square. Numbers ending in 0 are excluded.at n=12A202386
• Nonpalindromic positive integers k such that the absolute value of k^2 - reverse(k)^2 is a square.at n=31A256515
• Terms of A338039 that are repeated concatenations of smaller integers.at n=9A338166
• Positive integers m such that m * (m+1) contains at least 8 decimal digits that are in neither m nor m+1.at n=5A381247