52606009

Appears in sequences

• Squares that remain square when the digit 6 is appended.at n=5A023113
• Drop the last digit of A023110(n).at n=21A202303
• Numbers k such that triangular(k) + triangular(2*k) is a square.at n=8A224419
• Odd numbers n such that 2^n == 1 (mod sigma(n)).at n=2A279039