Smallest number such that n*a(n) is a concatenation of n consecutive integers; or 0 if no such number exists.

A075000

Smallest number such that n*a(n) is a concatenation of n consecutive integers; or 0 if no such number exists.

Terms

    a(0) =1a(1) =6a(2) =41a(3) =864a(4) =2469a(5) =20576a(6) =493827a(7) =7098637639a(8) =13717421a(9) =1234567891

External references