Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to a hexagonal number H(m) for some m.
A251924
Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to a hexagonal number H(m) for some m.
Terms
- a(0) =0a(1) =34a(2) =1188a(3) =40390a(4) =1372104a(5) =46611178a(6) =1583407980a(7) =53789260174
External references
- oeis: A251924