Tersum n + 6.

Terms

a(0) =6a(1) =7a(2) =8a(3) =0a(4) =1a(5) =2a(6) =3a(7) =4a(8) =5a(9) =15a(10) =16a(11) =17a(12) =9a(13) =10a(14) =11a(15) =12a(16) =13a(17) =14a(18) =24a(19) =25a(20) =26a(21) =18a(22) =19a(23) =20a(24) =21a(25) =22a(26) =23a(27) =33a(28) =34a(29) =35