5005050

Appears in sequences

• Numbers k such that k and k^2 use only the digits 0, 2 and 5.at n=24A136910
• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 7.at n=33A136915
• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 8.at n=35A136918