199998

Appears in sequences

• Number of nonzero palindromes less than 10^n.at n=9A050250
• Smallest even number with digit sum n.at n=44A069532
• Numbers k such that 4*k-1 is the digit reversal of k-1.at n=5A083812
• a(n) = 2*(10^n - 1).at n=5A086573
• a(n) = smallest non-palindromic number k such that the Reverse and Add! trajectory of k joins the trajectory of A089521(n).at n=1A089522
• a(n)*n = A112909(n).at n=4A112910
• Triangle, T(n, k) = (1/2)*(n+2)! * [x^k]( p(x, n) ), where p(x,0) = 1, p(x,1) = -x, P(x, n) = (1/(n+1))*( (2*n-x)*P(x, n-1) - n*P(x, n-2) ), read by rows.at n=30A136532
• Twice repdigit numbers.at n=45A152966
• Murai Chuzen numbers.at n=40A225488
• Numbers k having at least two complementary pairs of divisors (q, p) and (p', q') such that k = p*q = p'*q' where the decimal digits of p' are the 9's complement of the decimal digits of p and the decimal digits of q' are the 9's complement of the decimal digits of q.at n=36A226587
• Indices of records in A004290.at n=24A268610
• Integers x with h+1 digits that have the property that there exists an integer k, with x <= k < 2*x, such that k/x = 1 + (x-10^h)/(10^h-1), i.e., the same digits appear in the denominator and in the recurring decimal.at n=25A288781
• a(n) is the largest m such that there exists N such that none of S(N), S(N+1), ..., S(N+m-1) is divisible by n, where S(N) is the sum of digits of N.at n=45A331786
• Numbers k such that k divides Sum_{i=1..k} A004086(i).at n=24A369612