99909

Appears in sequences

• Numbers having four 9's in base 10.at n=27A043528
• Smallest multiple of n using only digits 0 and 9.at n=16A078248
• Numbers whose set of base 10 digits is {0,9}.at n=29A097256
• a(n) = (-1)^n * coefficient of x^n in Sum_{k>=1} x^(k-1)/(1+10*x^k).at n=5A101563
• Numbers n such that for every k = 1, 2, ..., A305706(n)-1, it is possible to insert plus signs into the decimal representation of n^k to make sum equal n.at n=62A305707