a(n) = 7*n^2 - 7*n - 43.

Terms

a(0) =-43a(1) =-29a(2) =-1a(3) =41a(4) =97a(5) =167a(6) =251a(7) =349a(8) =461a(9) =587a(10) =727a(11) =881a(12) =1049a(13) =1231a(14) =1427a(15) =1637a(16) =1861a(17) =2099a(18) =2351a(19) =2617a(20) =2897a(21) =3191a(22) =3499a(23) =3821a(24) =4157a(25) =4507a(26) =4871a(27) =5249a(28) =5641a(29) =6047