Numbers k such that the k-th triangular number contains only digits {2,8,9}.

A119181

Numbers k such that the k-th triangular number contains only digits {2,8,9}.

Terms

    a(0) =7a(1) =1287a(2) =4312a(3) =14087a(4) =75934087a(5) =421883687a(6) =773669476312

External references