a(n) = 2401*n^2 - 980*n + 99.

Terms

a(0) =1520a(1) =7743a(2) =18768a(3) =34595a(4) =55224a(5) =80655a(6) =110888a(7) =145923a(8) =185760a(9) =230399a(10) =279840a(11) =334083a(12) =393128a(13) =456975a(14) =525624a(15) =599075a(16) =677328a(17) =760383a(18) =848240a(19) =940899a(20) =1038360a(21) =1140623a(22) =1247688a(23) =1359555a(24) =1476224a(25) =1597695a(26) =1723968a(27) =1855043a(28) =1990920