Power floor sequence of sqrt(5).

Terms

a(0) =2a(1) =4a(2) =8a(3) =17a(4) =38a(5) =84a(6) =187a(7) =418a(8) =934a(9) =2088a(10) =4668a(11) =10437a(12) =23337a(13) =52183a(14) =116684a(15) =260913a(16) =583419a(17) =1304564a(18) =2917093a(19) =6522818a(20) =14585464a(21) =32614088a(22) =72927317a(23) =163070438a(24) =364636584a(25) =815352188a(26) =1823182917a(27) =4076760937a(28) =9115914583