Triangular numbers, T(m), that are five-quarters of another triangular number; T(m) such that 4*T(m) = 5*T(k) for some k.
A201004
Triangular numbers, T(m), that are five-quarters of another triangular number; T(m) such that 4*T(m) = 5*T(k) for some k.
Terms
- a(0) =0a(1) =45a(2) =14535a(3) =4680270a(4) =1507032450a(5) =485259768675
External references
- oeis: A201004