Concatenation of 1, 00, 111, 0000, ..., n 1's (if n is odd) or n 0's (if n is even).

A065447

Concatenation of 1, 00, 111, 0000, ..., n 1's (if n is odd) or n 0's (if n is even).

Terms

    a(0) =1a(1) =100a(2) =100111a(3) =1001110000

External references