a(n) = denominator(N) where N = 0.123...n (concatenation of 1 to n after decimal point).
A078257
a(n) = denominator(N) where N = 0.123...n (concatenation of 1 to n after decimal point).
Terms
- a(0) =10a(1) =25a(2) =1000a(3) =5000a(4) =20000a(5) =15625a(6) =10000000a(7) =50000000a(8) =1000000000a(9) =10000000000
External references
- oeis: A078257