a(n) = 6561*n^2 - 9558*n + 3482.

Terms

a(0) =3482a(1) =485a(2) =10610a(3) =33857a(4) =70226a(5) =119717a(6) =182330a(7) =258065a(8) =346922a(9) =448901a(10) =564002a(11) =692225a(12) =833570a(13) =988037a(14) =1155626a(15) =1336337a(16) =1530170a(17) =1737125a(18) =1957202a(19) =2190401a(20) =2436722a(21) =2696165a(22) =2968730a(23) =3254417a(24) =3553226a(25) =3865157a(26) =4190210a(27) =4528385