Numbers k such that the k-th triangular number contains only digits {3,6,7}.
A119195
Numbers k such that the k-th triangular number contains only digits {3,6,7}.
Terms
- a(0) =2a(1) =3a(2) =8a(3) =11a(4) =36a(5) =391a(6) =816a(7) =8563a(8) =39183a(9) =2594751
External references
- oeis: A119195