Number of complete subsets of {1..n} with maximum n.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =12a(7) =23a(8) =45a(9) =90a(10) =180a(11) =359a(12) =717a(13) =1432a(14) =2862a(15) =5723a(16) =11444a(17) =22887a(18) =45772a(19) =91541a(20) =183078a(21) =366151a(22) =732295a(23) =1464583a(24) =2929158a(25) =5858307a(26) =11716603a(27) =23433196a(28) =46866379a(29) =93732744