69684

Appears in sequences

• Numbers k such that k and k^2 use only the digits 4, 5, 6, 8 and 9.at n=1A137142
• a(n) = 144*n^2 - 12.at n=21A158543
• Numbers n such that the decimal expansions of both n and n^2 have 4 as the digit with the smallest value and 9 as the digit with the largest value.at n=3A254072