  We derive weighted summation identities involving the second order recurrence
sequence $\{w_n\} =\{ w_n(a,b; p, q)\}$ defined by $w_0 = a,\,w_1 = b;\,w_n =
pw_{n - 1} - qw_{n - 2}\, (n \ge 2)$, where $a$, $b$, $p$ and $q$ are arbitrary
complex numbers, with $p\ne 0$ and $q\ne 0$.
