6666665

Appears in sequences

• Numbers k such that k^2 contains only digits {2,4,5}.at n=21A031154
• Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 6.at n=38A137067
• Numbers k such that k and k^2 use only the digits 2, 4, 5 and 6.at n=8A137093
• Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 8.at n=45A137095
• Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 9.at n=41A137096
• For k in {2,3,...,9} define a sequence as follows: a(0)=0; for n>=0, a(n+1)=a(n)+1, unless a(n) ends in k, in which case a(n+1) is obtained by replacing the last digit of a(n) with the digit(s) of k^2. This is k(8).at n=35A237345
• Numbers k such that k+2 divides concat(k, k+1).at n=8A281232