a(n) is the concatenation of 1 written in base 2 once, 2 written in base 2 twice, ..., n written in base 2 n times.

A300557

a(n) is the concatenation of 1 written in base 2 once, 2 written in base 2 twice, ..., n written in base 2 n times.

Terms

    a(0) =1a(1) =11010a(2) =11010111111

External references