Number of non-graphical integer partitions of 2n.

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =13a(5) =25a(6) =46a(7) =81a(8) =141a(9) =234a(10) =383a(11) =615a(12) =968a(13) =1503a(14) =2298a(15) =3468a(16) =5176a(17) =7653a(18) =11178a(19) =16212a(20) =23290a(21) =33218a(22) =46996a(23) =66091a(24) =92277a(25) =128122a(26) =176787a(27) =242674a(28) =331338a(29) =450279