489731

Appears in sequences

• Non-palindromic numbers n such that the square root of n multiplied by the reversal of n is a palindrome.at n=23A258382
• Positive integers m such that 2*m^2 - 1 = x^4 + y^4 for some nonnegative integers x and y with |x - y| > 1.at n=16A343913