90000000

Appears in sequences

• Powers of 3 written in base 27.at n=23A004669
• Number of nonzero palindromes of length n.at n=14A050683
• Number of nonzero palindromes of length n.at n=15A050683
• First differences of 10^n (A011557).at n=7A052268
• Second column of triangle A055864.at n=8A055865
• Number of nonnegative integers with n digits.at n=7A063945
• Number of n-digit palindromes.at n=14A070252
• Number of n-digit palindromes.at n=15A070252
• a(1) = 1; for n >= 2, a(n) = (n*(n+1)^(n-1))/(n+1).at n=8A085389
• Numbers k such that the k-th triangular number contains only digits {0,4,5}.at n=22A119072
• a(n) = the largest n-digit number ending in n-1 zeros that is divisible by n, else 0.at n=7A173480
• a(n) = the largest (n+2)-digit number ending in n+1 zeros that is divisible by n, else 0.at n=5A173486
• Number A(n,k) of n-digit k-th powers; square array A(n,k), n>=1, k>=1, read by antidiagonals.at n=35A216653
• The largest n-digit number whose last k digits are divisible by k^2 for k = 1..n, otherwise 0.at n=7A228011
• a(n) = n^8 - n^7.at n=10A240931
• a(1) = 1; a(n) is the smallest natural number such that a(n) > a(n-1), and the name of a(n) in English starts with the letter a(n-1) ends with, and a(n) makes the sequence extendable.at n=20A281067