Power ceiling-floor sequence of sqrt(5).

Terms

a(0) =3a(1) =6a(2) =14a(3) =31a(4) =70a(5) =156a(6) =349a(7) =780a(8) =1745a(9) =3901a(10) =8723a(11) =19505a(12) =43615a(13) =97526a(14) =218075a(15) =487630a(16) =1090374a(17) =2438150a(18) =5451870a(19) =12190751a(20) =27259348a(21) =60953755a(22) =136296740a(23) =304768775a(24) =681483699a(25) =1523843876a(26) =3407418494a(27) =7619219380a(28) =17037092470