a(n) = (2*n*(n+1))^2.

Terms

a(0) =0a(1) =16a(2) =144a(3) =576a(4) =1600a(5) =3600a(6) =7056a(7) =12544a(8) =20736a(9) =32400a(10) =48400a(11) =69696a(12) =97344a(13) =132496a(14) =176400a(15) =230400a(16) =295936a(17) =374544a(18) =467856a(19) =577600a(20) =705600a(21) =853776a(22) =1024144a(23) =1218816a(24) =1440000a(25) =1690000a(26) =1971216a(27) =2286144a(28) =2637376a(29) =3027600