555555555555
domain: N
Appears in sequences
- a(n) = 5*(10^n - 1)/9.at n=12A002279
- Fancy primitive repdigit polygonal numbers.at n=23A033704
- Fancy primitive repdigit polygonal numbers (with multiplicity).at n=25A033705
- Fancy primitive repdigit polygonal numbers (with multiplicity).at n=26A033705
- Repdigits which are the average of two successive primes.at n=7A104389
- a(n) is the least positive integer in base 10 containing n fives that is divisible by n.at n=10A112900
- Expansion of x*(1 + 5*x + 40*x^2)/((1 - x^2)*(1 - 10*x^2)).at n=24A322927
- Repdigit numbers that are divisible by 7.at n=24A366596