a(n) = floor(n*phi^6), phi = golden ratio, A001622.

Terms

a(0) =0a(1) =17a(2) =35a(3) =53a(4) =71a(5) =89a(6) =107a(7) =125a(8) =143a(9) =161a(10) =179a(11) =197a(12) =215a(13) =233a(14) =251a(15) =269a(16) =287a(17) =305a(18) =322a(19) =340a(20) =358a(21) =376a(22) =394a(23) =412a(24) =430a(25) =448a(26) =466a(27) =484a(28) =502a(29) =520