Base-3 representation of a(n) is the concatenation of the base-3 representations of 1, 2, ..., n, n-1, ..., 1.
A260853
Base-3 representation of a(n) is the concatenation of the base-3 representations of 1, 2, ..., n, n-1, ..., 1.
Terms
- a(0) =0a(1) =1a(2) =16a(3) =439a(4) =35350a(5) =2864599a(6) =232046890a(7) =18795930559
External references
- oeis: A260853