Concatenate the ternary strings for 1,2,...,n-1, n, n-1, ..., 2,1.
A360504
Concatenate the ternary strings for 1,2,...,n-1, n, n-1, ..., 2,1.
Terms
- a(0) =1a(1) =121a(2) =121021a(3) =1210111021
External references
- oeis: A360504
A360504
Concatenate the ternary strings for 1,2,...,n-1, n, n-1, ..., 2,1.