a(n) = 16*n^5 + 70*n^4 + 105*n^3 + 65*n^2 + 15*n + 1.

Terms

a(0) =1a(1) =272a(2) =2763a(3) =13024a(4) =42125a(5) =108576a(6) =240247a(7) =476288a(8) =869049a(9) =1486000a(10) =2411651a(11) =3749472a(12) =5623813a(13) =8181824a(14) =11595375a(15) =16062976a(16) =21811697a(17) =29099088a(18) =38215099a(19) =49484000a(20) =63266301a(21) =79960672a(22) =100005863a(23) =123882624a(24) =152115625a(25) =185275376a(26) =223980147a(27) =268897888a(28) =320748149