999999998

Appears in sequences

• a(n)^3 is smallest cube containing exactly n 9's.at n=15A048374
• Largest n-digit squarefree number.at n=8A074110
• {Concatenation of n-1 and n+1}/n where n is a member of A069871.at n=18A077192
• Largest n-digit squarefree number beginning with n.at n=8A077514
• Positive integers k such that f(k)+f(k)=concatenation of k and k, where f(k)=k(k+3)/2 (A000096).at n=8A099150
• Largest n-digit number coprime to n.at n=8A108908
• Numbers k such that k*(k+6) gives the concatenation of two numbers m and m-9.at n=8A116229
• Largest n-digit number that is divisible by exactly 3 primes (counted with multiplicity).at n=8A180927
• a(n) is the largest n-digit number with exactly 8 divisors, a(n) = 0 if no such number exists.at n=8A182676
• Positive integers a(n) such that number of digits in decimal expansion of a(n)^a(n) is divisible by a(n).at n=17A256162
• Largest n-digit number missing in first 10^n digits after the decimal point in expansion of Pi.at n=8A260627
• Numbers n such that the sum of the digits of the numbers from 1 to n divides the sum of the numbers from 1 to n.at n=50A272360
• Nontotients of the form 10^k - 2.at n=7A292552
• Zeroless numbers that have the largest possible remainder when divided by their digit product.at n=17A348834