Smallest multiple of the concatenation of 1 up to n that begins with the concatenation of n down to 1.

A078204

Smallest multiple of the concatenation of 1 up to n that begins with the concatenation of n down to 1.

Terms

    a(0) =1a(1) =216a(2) =32103a(3) =4321468a(4) =543217035a(5) =65432173824

External references