Triangular numbers that for some k are also the sum of the first k composites.
A298270
Triangular numbers that for some k are also the sum of the first k composites.
Terms
- a(0) =0a(1) =10a(2) =78a(3) =153a(4) =946a(5) =177310a(6) =450775a(7) =13595505a(8) =150988753a(9) =4478601403a(10) =5409300078a(11) =5589152128a(12) =76060335351a(13) =248156250265
External references
- oeis: A298270