2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/164254We generalize both the Fibonacci and Lucas numbers to the context of graph colorings, and prove some identities involving these numbers. As a corollary we obtain new proofs of some known identities involving Fibonacci numbers such as \[F_{r+s+t} = F_{r+1}F_{s+1}F_{t+1} + F_r F_s F_t - F_{r-1}F_{s-1}F_{t-1}.\]5 pages, 1 figureCombinatoricsGeneral Mathematics05C15, 05A19, 05C38text