Powers of sqrt(8) rounded down.

Terms

a(0) =1a(1) =2a(2) =8a(3) =22a(4) =64a(5) =181a(6) =512a(7) =1448a(8) =4096a(9) =11585a(10) =32768a(11) =92681a(12) =262144a(13) =741455a(14) =2097152a(15) =5931641a(16) =16777216a(17) =47453132a(18) =134217728a(19) =379625062a(20) =1073741824a(21) =3037000499a(22) =8589934592a(23) =24296003999a(24) =68719476736