proposition: Lemma fuscj_1 n: Fuscj 1 n = Fuscj 0 (n.*2.+1).
proof: Proof. apply:(fuscj_odd 0). Qed.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat) mathcomp(seq choice fintype order bigop ssralg) mathcomp(div ssrnum ssrint rat prime path binomial) mathcomp(tuple finset) gaia(fibm)