48139

Appears in sequences

• Nonpalindromic numbers k such that k is not divisible by 10 and k*R(k) is a square, where R(k) is the reversal of k (A004086).at n=35A062917
• Numbers k such that all the following properties hold: (i) k*reverse(k) is a square; (ii) k != reverse(k); (iii) k and reverse(k) are not both squares; and (iv) k and reverse(k) have the same number of digits.at n=22A082994
• Apocalypse primes: 10^665+a(n) has 666 decimal digits and is prime.at n=32A115983
• Numbers that can be written as the sum of four or more consecutive squares in more than one way.at n=38A307937