Recurrence 5 lookup certificate: A3Square degree bound

This is a checked coefficient-lookup shard for the fifth pseudo-division recurrence in the order-seven certificate.

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence5A3Square_natDegree_le : Polynomial.natDegree recurrence5A3Square ≤ 328

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence5A3Square_coeff_high (n : ℕ) (h : 328 < n) : Polynomial.coeff recurrence5A3Square n = 0