111111111111
domain: N
Appears in sequences
- Unary representation of natural numbers.at n=11A000042
- Repunits: (10^n - 1)/9. Often denoted by R_n.at n=12A002275
- 12 in base 12-n.at n=11A008709
- Sums of 12 distinct powers of 10.at n=0A038454
- k th digit of a(n) is the number of different digits within 1 of k (not including k).at n=13A039988
- Integer parts of the square roots of the schizophrenic numbers (A014824).at n=22A068995
- a(1) = 1; a(n) = smallest palindromic number of the form k*a(n-1) + 1 with k > 1.at n=13A069505
- a(1) = 2; a(n) = smallest palindromic number of the form k*a(n-1) + 1 with k > 1.at n=12A069506
- a(1) = 4; a(n) = smallest palindromic number of the form k*a(n-1) + 1 with k > 1.at n=12A069507
- a(1) = 6; a(n) = smallest palindromic number of the form k*a(n-1) + 1 with k > 1.at n=11A069508
- a(1) = 1; a(n) = smallest palindrome of the form k*a(n-1) + 1.at n=19A069510
- Numbers m that divide the concatenation of m-1 and m+1.at n=23A069871
- Repdigits (A010785) ordered by sum of digits (A007953).at n=32A070840
- Sum_{k=1..n, gcd(n,k) = 1} 10^(k-1).at n=11A073030
- Jacobsthal sequence (A001045) as represented in base 4.at n=24A081857
- Smallest number with all identical digits having n distinct prime divisors.at n=7A087331
- Expansion of x(1+10x)/((1-x^2)(1-10x^2)).at n=23A094026
- a(n) = 12 written in base n.at n=0A095427
- Bisection of A002275.at n=6A099814
- a(n) = Sum_{j=0..11} n^j.at n=10A105067