Triangular numbers composed of digits {0,5,7}.

A119081

Triangular numbers composed of digits {0,5,7}.

Terms

    a(0) =55a(1) =5050a(2) =7750a(3) =70500a(4) =500500a(5) =50005000a(6) =5000050000a(7) =500000500000

External references