Smallest triangular number containing all the digits of numbers from 1 to n.

A069601

Smallest triangular number containing all the digits of numbers from 1 to n.

Terms

    a(0) =1a(1) =21a(2) =231a(3) =12403a(4) =24531a(5) =235641a(6) =2467531a(7) =13862745a(8) =153694278a(9) =10429651378

External references