Number of isomorphism classes of nanocones with 5 pentagons and a symmetric boundary of length n.

Terms

a(0) =1a(1) =5a(2) =14a(3) =41a(4) =93a(5) =212a(6) =413a(7) =797a(8) =1399a(9) =2424a(10) =3941a(11) =6317a(12) =9686a(13) =14654a(14) =21451a(15) =31025a(16) =43754a(17) =61042a(18) =83484a(19) =113084a(20) =150732a(21) =199211a(22) =259804a(23) =336263a(24) =430401a(25) =547166a(26) =689034a(27) =862426a(28) =1070653a(29) =1321891