100040001

Appears in sequences

• Numbers k such that k^2 contains only digits {0,1,8}, not ending with zero.at n=21A058421
• Palindromes n for which there is a unique k such that n = k + reverse(k).at n=25A068065
• Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 8.at n=25A136857
• Numbers k such that k and k^2 use only the digits 0, 1, 4 and 8.at n=16A136866
• a(n) = (10^n)^2 + 4*(10^n) + 1.at n=4A225810