405919

Appears in sequences

• Number of basic invariants for cyclic group of order and degree n.at n=32A002956
• a(n) is the number of nonnegative integers k less than 10^n such that the decimal representation of k lacks the digit 1, at least one of the digits 2,3 and at least one of digits 4,5,6,7,8,9.at n=5A125909