6666666

Appears in sequences

• a(n) = 6*(10^n - 1)/9.at n=7A002280
• a(n) = floor(10^8/n).at n=14A033424
• Append d digits d after each digit d in decimal expansion of n.at n=6A048377
• Numbers n such that n and 2n-1 are both palindromes.at n=11A069882
• Worthless numbers: numbers without h, o, r, t, or w.at n=14A073419
• Number of Fibonacci numbers F(k), k <= 10^n, which end in 2.at n=7A073548
• Number of Fibonacci numbers F(k), k <= 10^n, which end in 6.at n=7A073549
• Squarefree numbers obtained by repeating a single digit.at n=35A077571
• a(n) = A084006(n)^(1/2).at n=18A084007
• Largest term in periodic part of continued fraction expansion of square root of n-th repunit.at n=13A096487
• Repdigit Smith numbers.at n=4A104166
• Numbers k such that the k-th triangular number contains only digits {0,1,2}.at n=23A119034
• Numbers k such that the k-th triangular number contains only digits {1,2,3}.at n=20A119098
• Numbers k such that the k-th triangular number contains only digits {1,2,4}.at n=11A119100
• Numbers k such that the k-th triangular number contains only digits {1,2,5}.at n=28A119102
• Numbers k such that the k-th triangular number contains only digits {1,2,6}.at n=28A119104
• Numbers k such that the k-th triangular number contains only digits {1,2,7}.at n=16A119106
• Numbers k such that the k-th triangular number contains only digits {1,2,8}.at n=21A119108
• Numbers k such that the k-th triangular number contains only digits {1,2,9}.at n=12A119110
• Numbers k such that k and k^2 use only the digits 0, 3, 4, 5 and 6.at n=42A136927