Number of isolated-pentagon fullerenes with 2n vertices (or carbon atoms).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =1a(8) =3a(9) =6a(10) =9a(11) =12a(12) =34a(13) =33a(14) =56a(15) =78a(16) =161a(17) =252a(18) =349a(19) =483a(20) =862a(21) =1179a(22) =1606a(23) =2401a(24) =3502a(25) =4645a(26) =6568a(27) =8820a(28) =11997a(29) =16132