Positive integers n for which n = f(n), where f(n) is the total number of 2's required when writing out all numbers between 0 and n.
A101639
Positive integers n for which n = f(n), where f(n) is the total number of 2's required when writing out all numbers between 0 and n.
Terms
- a(0) =28263827a(1) =35000000a(2) =242463827a(3) =500000000a(4) =528263827a(5) =535000000a(6) =10000000000a(7) =10028263827a(8) =10035000000a(9) =10242463827a(10) =10500000000a(11) =10528263827a(12) =10535000000
External references
- oeis: A101639