Smallest triangular number containing exactly n 5's.

A036522

Smallest triangular number containing exactly n 5's.

Terms

    a(0) =15a(1) =55a(2) =5565a(3) =255255a(4) =12552555a(5) =585555531a(6) =5355555765a(7) =50525595555a(9) =555595555515

External references