Tersum n + 20.

Terms

a(0) =20a(1) =18a(2) =19a(3) =23a(4) =21a(5) =22a(6) =26a(7) =24a(8) =25a(9) =2a(10) =0a(11) =1a(12) =5a(13) =3a(14) =4a(15) =8a(16) =6a(17) =7a(18) =11a(19) =9a(20) =10a(21) =14a(22) =12a(23) =13a(24) =17a(25) =15a(26) =16a(27) =47a(28) =45a(29) =46