Base-11 representation of a(n) is the concatenation of the base-11 representations of 1, 2, ..., n, n-1, ..., 1.
A260861
Base-11 representation of a(n) is the concatenation of the base-11 representations of 1, 2, ..., n, n-1, ..., 1.
Terms
- a(0) =0a(1) =1a(2) =144a(3) =17689a(4) =2143296a(5) =259371025a(6) =31384248336
External references
- oeis: A260861