The 240-degree spoke (or ray) of a hexagonal spiral of Ulam.

Terms

a(0) =1a(1) =16a(2) =55a(3) =118a(4) =205a(5) =316a(6) =451a(7) =610a(8) =793a(9) =1000a(10) =1231a(11) =1486a(12) =1765a(13) =2068a(14) =2395a(15) =2746a(16) =3121a(17) =3520a(18) =3943a(19) =4390a(20) =4861a(21) =5356a(22) =5875a(23) =6418a(24) =6985a(25) =7576a(26) =8191a(27) =8830a(28) =9493a(29) =10180