proposition: Lemma sternD_middle' n : nth 0 (stern11 n.+1) (2^n) = 2.
proof: Proof. by apply:sternD_middle. 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)