Number of subsets of {1...n} with no binary containments.

Terms

a(0) =1a(1) =2a(2) =4a(3) =5a(4) =10a(5) =13a(6) =18a(7) =19a(8) =38a(9) =52a(10) =77a(11) =83a(12) =133a(13) =147a(14) =166a(15) =167a(16) =334a(17) =482a(18) =764a(19) =848a(20) =1465a(21) =1680a(22) =1987a(23) =2007a(24) =3699a(25) =4413a(26) =5488a(27) =5572a(28) =7264a(29) =7412