63000000

Appears in sequences

• Triangle whose (i,j)-th entry is binomial(i,j)*10^(i-j)*9^j.at n=29A038311
• Total number of digits in all n-digit nonnegative integers.at n=6A113119
• a(n)=2a(n-1) but when sum of digits of 2a(n-1) is greater than 9 take a(n) = largest number < 2a(n-1) which has sum of digits = 9.at n=26A140134
• a(n) = 9*n*10^(n-1).at n=6A212704