999998

Appears in sequences

• {Concatenation of n-1 and n+1}/n where n is a member of A069871.at n=12A077192
• Positive integers k such that f(k)+f(k)=concatenation of k and k, where f(k)=k(k+3)/2 (A000096).at n=5A099150
• Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 5.at n=13A116130
• Numbers k such that k*(k+6) gives the concatenation of two numbers m and m-9.at n=5A116229
• n times n+5 gives the concatenation of two numbers m and m-6.at n=18A116249
• Numbers k such that k*(k+4) gives the concatenation of two numbers m and m-3.at n=14A116267
• Numbers k such that k*(k+3) gives the concatenation of a number m with itself.at n=13A116287
• a(n) = the largest n-digit number with exactly 12 divisors, a(n) = 0 if no such number exists.at n=5A182684
• Second-order base-10 grafting integers.at n=18A232087
• Positive integers a(n) such that number of digits in decimal expansion of a(n)^a(n) is divisible by a(n).at n=11A256162
• Nontotients of the form 10^k - 2.at n=4A292552
• Numbers k such that the digits of sqrt(k) begin with k.at n=8A307371
• Indices of records in A034058.at n=45A389569