88887

Appears in sequences

• Smallest semiprime containing exactly n 8's.at n=3A104761
• Near-repdigit semiprimes with 8 as repeated digit.at n=11A105989
• Numbers k such that k and k^2 use only the digits 0, 6, 7, 8 and 9.at n=10A136966
• a(n) = (8*10^n - 17)/9 for n > 0.at n=4A173812
• 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(9).at n=43A237346
• Consider a decimal number of k>=2 digits z = d_(k)*10^(k-1) + d_(k-1)*10^(k-2) + ... + d_(2)*10 + d_(1) and the sum y = Sum_{x=2..k} {Sum_{j=1..k-x}{d_(j+x-1)*10^(j-1)} - Sum_{j=1..x-1}{d_(j)*10^(j-1)}}. Sequence lists the numbers for which y = tau(z), where tau(z) is the number of divisors of z.at n=29A248904