a(n) is the maximal difference between two distinct n-digit numbers with the property that when one of them is typed into a calculator and rotated 180 degrees, the other one is seen.
A125520
a(n) is the maximal difference between two distinct n-digit numbers with the property that when one of them is typed into a calculator and rotated 180 degrees, the other one is seen.
Terms
- a(0) =3a(1) =75a(2) =825a(3) =8835a(4) =89235a(5) =898335a(6) =8992335a(7) =89983335a(8) =899923335a(9) =8999833335a(10) =89999233335a(11) =899998333335
External references
- oeis: A125520