99999998
domain: N
Appears in sequences
- a(0) = 0; a(n) is obtained by incrementing each digit of a(n-1) by 2.at n=19A061513
- Largest n-digit squarefree number.at n=7A074110
- {Concatenation of n-1 and n+1}/n where n is a member of A069871.at n=16A077192
- Positive integers k such that f(k)+f(k)=concatenation of k and k, where f(k)=k(k+3)/2 (A000096).at n=7A099150
- Numbers k such that k concatenated with k-4 gives the product of two numbers which differ by 5.at n=17A116130
- Numbers k such that k*(k+6) gives the concatenation of two numbers m and m-9.at n=7A116229
- n times n+5 gives the concatenation of two numbers m and m-6.at n=24A116249
- Numbers k such that k*(k+4) gives the concatenation of two numbers m and m-3.at n=20A116267
- Numbers k such that k*(k+3) gives the concatenation of a number m with itself.at n=17A116287
- Second-order base-10 grafting integers.at n=30A232087
- Positive integers a(n) such that number of digits in decimal expansion of a(n)^a(n) is divisible by a(n).at n=15A256162
- Largest n-digit number ending in n.at n=7A279913
- Nontotients of the form 10^k - 2.at n=6A292552
- Numbers k such that the digits of sqrt(k) begin with k.at n=11A307371