Number of isolated-pentagon (IPR) 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) =2a(9) =5a(10) =7a(11) =9a(12) =24a(13) =19a(14) =35a(15) =46a(16) =86a(17) =134a(18) =187a(19) =259a(20) =450a(21) =616a(22) =823a(23) =1233a(24) =1799a(25) =2355a(26) =3342a(27) =4468a(28) =6063a(29) =8148