Numbers k such that the k-th triangular number contains only digits {0,6,7}.
A119088
Numbers k such that the k-th triangular number contains only digits {0,6,7}.
Terms
- a(0) =3a(1) =11a(2) =36a(3) =115a(4) =363a(5) =1095a(6) =11576a(7) =36624a(8) =363504a(9) =391576a(10) =391588a(11) =36333648a(12) =123288823a(13) =3660785999
External references
- oeis: A119088