(2*16^(5^n) - 1) mod 10^n: a sequence of trimorphic numbers ending in 1.
A224474
(2*16^(5^n) - 1) mod 10^n: a sequence of trimorphic numbers ending in 1.
Terms
- a(0) =1a(1) =51a(2) =751a(3) =8751a(4) =18751a(5) =218751a(6) =4218751a(7) =74218751a(8) =574218751a(9) =3574218751a(10) =63574218751a(11) =163574218751a(12) =163574218751
External references
- oeis: A224474