Number of unlabeled identity unit interval graphs.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =2a(6) =4a(7) =15a(8) =36a(9) =108a(10) =276a(11) =771a(12) =2044a(13) =5622a(14) =15204a(15) =41835a(16) =114708a(17) =317382a(18) =879008a(19) =2447951a(20) =6833084a(21) =19146910a(22) =53786076a(23) =151537847a(24) =427946916a(25) =1211440440a(26) =3436543336a(27) =9768382171a(28) =27817787344a(29) =79356481542