a(n) = ceiling(n*phi^18), where phi is the golden ratio, A001622.

Terms

a(0) =0a(1) =5778a(2) =11556a(3) =17334a(4) =23112a(5) =28890a(6) =34668a(7) =40446a(8) =46224a(9) =52002a(10) =57780a(11) =63558a(12) =69336a(13) =75114a(14) =80892a(15) =86670a(16) =92448a(17) =98226a(18) =104004a(19) =109782a(20) =115560a(21) =121338a(22) =127116a(23) =132894a(24) =138672a(25) =144450a(26) =150228