a(n) = [ n/{n*sqrt(5)} ], where {x} := x - [ x ].

Terms

a(0) =4a(1) =4a(2) =4a(3) =4a(4) =27a(5) =14a(6) =10a(7) =9a(8) =72a(9) =27a(10) =18a(11) =14a(12) =188a(13) =45a(14) =27a(15) =20a(16) =1292a(17) =72a(18) =39a(19) =27a(20) =21a(21) =113a(22) =53a(23) =36a(24) =27a(25) =188a(26) =72a(27) =45a(28) =34a(29) =365