222222222222
domain: N
Appears in sequences
- a(n) = 2*(10^n - 1)/9.at n=12A002276
- Smallest number with all identical digits having n distinct prime divisors.at n=8A087331
- A Jacobsthal sequence (A078008) to base 4.at n=25A092900
- Expansion of x*(1+x)/((1-x)*(1-10*x^2)).at n=24A094626
- a(n) is the least positive integer in base 10 containing n twos that is divisible by n.at n=10A112893
- Smallest positive number divisible by n whose decimal expansion has the form 22...200...0.at n=12A216812
- Numbers n such that the cardinality of (natural numbers <=n with a first digit of 1) = n/2.at n=22A228158
- Expansion of x*(1 + 2*x + 10*x^2)/((1 - x^2)*(1 - 10*x^2)).at n=24A322925
- a(n) is the length of the decimal expansion of A330192(n)^A330192(n).at n=39A330193
- Repdigit numbers that are divisible by 7.at n=21A366596