Numbers k such that the k-th triangular number contains only digits {2,5,8}.

A119169

Numbers k such that the k-th triangular number contains only digits {2,5,8}.

Terms

    a(0) =7a(1) =10a(2) =32a(3) =714a(4) =1025a(5) =1287a(6) =6712a(7) =10849a(8) =13285a(9) =23885a(10) =711129a(11) =22595807a(12) =22619825a(13) =40641912a(14) =715385610a(15) =33343322745a(16) =332431301950

External references