111111111

Appears in sequences

• Unary representation of natural numbers.at n=8A000042
• a(n) is 9 written in base 10-n.at n=9A001731
• Repunits: (10^n - 1)/9. Often denoted by R_n.at n=9A002275
• Least positive multiple of n that when written in base 10 uses only 0's and 1's.at n=8A004290
• Divisors of 999999999.at n=17A027889
• a(n) = floor(10^9/n).at n=8A033423
• Fancy primitive repdigit polygonal numbers.at n=19A033704
• Fancy primitive repdigit polygonal numbers (with multiplicity).at n=21A033705
• Sums of 9 distinct powers of 10.at n=0A038451
• k th digit of a(n) is the number of different digits within 1 of k (not including k).at n=9A039988
• a(n)^2 is a square whose consecutive digits differ by 1.at n=12A048412
• a(n) = (n^(n-1) - 1)/(n-1) for n>1, a(1) = 0.at n=9A060072
• a(n) = floor(10^n/n).at n=8A060156
• Digital representation of n contains only 1's and 0's, is palindromic and contains no singleton 1's or 0's.at n=13A061851
• Digital representation of m contains only either 1's or 2's (but not both 1's and 2's) and 0's, is palindromic and contains no singleton 2's, 1's or 0's.at n=24A061852
• Square array read by antidiagonals of n written in base k (n,k>0).at n=44A063431
• Triangle read by rows in which k-th entry in row n is representation of n in base k, for 1 <= k <= n.at n=36A063432
• a(n) = A066557(n)/n.at n=8A066558
• Integers of the form (rep(n)-1)/n where rep(n)=1111111111...111 with n 1's is the n-th repunit number.at n=3A067944
• Nonsquarefree repunits.at n=0A068538