199991

Appears in sequences

• Composite numbers whose prime factors contain no digits other than 1 and 8.at n=17A036308
• n sets a new record for the number of integers k such that n = k + reverse(k).at n=32A067035
• Palindromes k such that k + 11 is also a palindrome.at n=32A082275
• Smallest palindromic multiple of 11, sum of whose digits at some stage is equal to n.at n=37A083516
• Define d(n,k) to be the number of '1' digits required to write out all the integers from 1 through k in base n. E.g., d(10,9) = 1 (just '1'), d(10,10) = 2 ('1' and '10'), d(10,11) = 4 ('1', '10' and '11'). Then a(n) is the first k >= 1 such that d(n,k) > k.at n=9A092175
• Let s(n) be the smallest number x such that the decimal representation of n appears as a substring of the decimal representations of the numbers [0...x] more than x times.at n=0A164321
• a(n) = n 9's sandwiched between two 1's.at n=4A185123
• First quadrisection of A332843.at n=36A330522
• Base-ten n containing a digit making its n-th appearance in the list of consecutive positive integers.at n=11A339752