Number of maximal triangle-free graphs with n vertices.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =6a(7) =10a(8) =16a(9) =31a(10) =61a(11) =147a(12) =392a(13) =1274a(14) =5036a(15) =25617a(16) =164796a(17) =1337848a(18) =13734745a(19) =178587364a(20) =2911304940a(21) =58919069858