Triangular numbers composed of digits {1,4,5}.
A119123
Triangular numbers composed of digits {1,4,5}.
Terms
- a(0) =1a(1) =15a(2) =45a(3) =55a(4) =5151a(5) =44551a(6) =45451a(7) =1551441a(8) =51141441a(9) =51151555a(10) =114511411a(11) =4141455555a(12) =44144455545
External references
- oeis: A119123