Pierce Expansion of tanh(1).

Terms

a(0) =1a(1) =4a(2) =21a(3) =38a(4) =117a(5) =7135a(6) =7809a(7) =1614095a(8) =3624914a(9) =8425892a(10) =16789093a(11) =18206374a(12) =20026429a(13) =106066483a(14) =297533015a(15) =329807820a(16) =393798971a(17) =762907505a(18) =98220075842a(19) =124475838767a(20) =132042717951a(21) =252079930415a(22) =308550332741