Beatty sequence of (5+sqrt(13))/2.

Terms

a(0) =4a(1) =8a(2) =12a(3) =17a(4) =21a(5) =25a(6) =30a(7) =34a(8) =38a(9) =43a(10) =47a(11) =51a(12) =55a(13) =60a(14) =64a(15) =68a(16) =73a(17) =77a(18) =81a(19) =86a(20) =90a(21) =94a(22) =98a(23) =103a(24) =107a(25) =111a(26) =116a(27) =120a(28) =124a(29) =129