P_6(2n+1), the Legendre polynomial of order 6 at 2n+1.

Terms

a(0) =1a(1) =8989a(2) =213445a(3) =1651609a(4) =7544041a(5) =25289461a(6) =69125869a(7) =163456945a(8) =346843729a(9) =676661581a(10) =1234422421a(11) =2131762249a(12) =3517093945a(13) =5582925349a(14) =8573842621a(15) =12795158881a(16) =18622228129a(17) =26510424445a(18) =37005786469a(19) =50756327161