Numbers that have only the digit "1" as first, central and final digit. For numbers with 5 or more digits the rest of digits are "0".
A135577
Numbers that have only the digit "1" as first, central and final digit. For numbers with 5 or more digits the rest of digits are "0".
Terms
- a(0) =1a(1) =111a(2) =10101a(3) =1001001a(4) =100010001a(5) =10000100001
External references
- oeis: A135577