a(0)=360, a(n)=a(n-1)+720 for n>=1.

Terms

a(0) =360a(1) =1080a(2) =1800a(3) =2520a(4) =3240a(5) =3960a(6) =4680a(7) =5400a(8) =6120a(9) =6840a(10) =7560a(11) =8280a(12) =9000a(13) =9720a(14) =10440a(15) =11160a(16) =11880a(17) =12600a(18) =13320a(19) =14040a(20) =14760a(21) =15480a(22) =16200a(23) =16920a(24) =17640a(25) =18360a(26) =19080a(27) =19800a(28) =20520a(29) =21240