Powers of sqrt(24) rounded up.

Terms

a(0) =1a(1) =5a(2) =24a(3) =118a(4) =576a(5) =2822a(6) =13824a(7) =67724a(8) =331776a(9) =1625364a(10) =7962624a(11) =39008732a(12) =191102976a(13) =936209560a(14) =4586471424a(15) =22469029418a(16) =110075314176a(17) =539256706016