a(n) is the first triangular number whose decimal representation uses n distinct digits.

A260214

a(n) is the first triangular number whose decimal representation uses n distinct digits.

Terms

    a(0) =0a(1) =10a(2) =105a(3) =1035a(4) =10296a(5) =102378a(6) =1024596a(7) =10348975a(8) =102738945a(9) =1062489753

External references