Coefficients for numerical differentiation.

Terms

a(0) =1a(1) =1a(2) =7a(3) =41a(4) =479a(5) =59a(6) =266681a(7) =63397a(8) =514639a(9) =178939a(10) =10410343a(11) =18500393a(12) =40799043101a(13) =1411432849a(14) =6620481151a(15) =48409924397a(17) =339716530787a(20) =222226462279