a(n) = 60*n^2 + 1.

Terms

a(0) =1a(1) =61a(2) =241a(3) =541a(4) =961a(5) =1501a(6) =2161a(7) =2941a(8) =3841a(9) =4861a(10) =6001a(11) =7261a(12) =8641a(13) =10141a(14) =11761a(15) =13501a(16) =15361a(17) =17341a(18) =19441a(19) =21661a(20) =24001a(21) =26461a(22) =29041a(23) =31741a(24) =34561a(25) =37501a(26) =40561a(27) =43741a(28) =47041a(29) =50461