Triangular numbers composed of digits {1,6,8}.
A119142
Triangular numbers composed of digits {1,6,8}.
Terms
- a(0) =1a(1) =6a(2) =66a(3) =666a(4) =861a(5) =116886a(6) =1188111a(7) =8166861a(8) =681118686a(9) =8186688861a(10) =181886818816a(11) =616886668881
External references
- oeis: A119142