Recurrence 2 lookup certificate: A6Square degree bound

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

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence2A6Square_natDegree_le : Polynomial.natDegree recurrence2A6Square ≤ 190

theorem MazurTorsion.Kubert.OrderSevenBacktrackingCertificate.Internal.ResultantCertificate.recurrence2A6Square_coeff_high (n : ℕ) (h : 190 < n) : Polynomial.coeff recurrence2A6Square n = 0