Number of n-digit positive integers that are the product of two integers ending with 5.
A337855
Number of n-digit positive integers that are the product of two integers ending with 5.
Terms
- a(0) =0a(1) =2a(2) =18a(3) =180a(4) =1800a(5) =18000a(6) =180000a(7) =1800000a(8) =18000000a(9) =180000000a(10) =1800000000a(11) =18000000000a(12) =180000000000
External references
- oeis: A337855