9123456789

Appears in sequences

• a(1) = 1; for n > 1, a(n) > a(n-1) is the smallest number such that the concatenation a(1)a(2)a(3)... forms a cyclic concatenation of 123456789 (of nonzero digits).at n=33A081549
• a(n) = Sum_{ k = 0 to n-1} ( subtract k modulo 9 from 9, multiply this by k-th power of 10 ).at n=9A133486
• a(n) = numerator of fraction whose decimal representation is (n).(1)(2)(3)...(n-1)(n).at n=8A172495
• Concatenation of the decimal digits of {n, 1..n}.at n=8A357915