a(n) is the concatenation of n 1's, 0, n 1's and 0.
A173521
a(n) is the concatenation of n 1's, 0, n 1's and 0.
Terms
- a(0) =0a(1) =1010a(2) =110110a(3) =11101110a(4) =1111011110a(5) =111110111110
External references
- oeis: A173521
A173521
a(n) is the concatenation of n 1's, 0, n 1's and 0.