a(n) = 225*n^2 - 251*n + 70.

Terms

a(0) =70a(1) =44a(2) =468a(3) =1342a(4) =2666a(5) =4440a(6) =6664a(7) =9338a(8) =12462a(9) =16036a(10) =20060a(11) =24534a(12) =29458a(13) =34832a(14) =40656a(15) =46930a(16) =53654a(17) =60828a(18) =68452a(19) =76526a(20) =85050a(21) =94024a(22) =103448a(23) =113322a(24) =123646a(25) =134420a(26) =145644a(27) =157318a(28) =169442a(29) =182016