Chebyshev polynomial of the second kind U(4,n).

Terms

a(0) =1a(1) =5a(2) =209a(3) =1189a(4) =3905a(5) =9701a(6) =20305a(7) =37829a(8) =64769a(9) =104005a(10) =158801a(11) =232805a(12) =330049a(13) =454949a(14) =612305a(15) =807301a(16) =1045505a(17) =1332869a(18) =1675729a(19) =2080805a(20) =2555201a(21) =3106405a(22) =3742289a(23) =4471109a(24) =5301505a(25) =6242501a(26) =7303505a(27) =8494309a(28) =9825089a(29) =11306405