Concatenation of digits of natural numbers from n down to 1.

A104759

Concatenation of digits of natural numbers from n down to 1.

Terms

    a(0) =1a(1) =21a(2) =321a(3) =4321a(4) =54321a(5) =654321a(6) =7654321a(7) =87654321a(8) =987654321a(9) =1987654321a(10) =1987654321a(11) =101987654321

External references