a(n) is the smallest number whose factorial has 10^n trailing zeros.
A173558
a(n) is the smallest number whose factorial has 10^n trailing zeros.
Terms
- a(0) =5a(1) =45a(2) =405a(3) =4005a(4) =40010a(5) =400005a(6) =4000005a(7) =40000010a(8) =400000015a(9) =4000000015a(10) =40000000015a(11) =400000000015
External references
- oeis: A173558