Number of fusenes with 23 hexagons, C_(2v) symmetry and containing n carbon atoms.

Terms

a(0) =2a(1) =9a(2) =33a(3) =38a(4) =236a(5) =126a(6) =723a(7) =473a(8) =2416a(9) =1658a(10) =7813a(11) =4675a(12) =21575a(13) =13325a(14) =57298a(15) =36963a(16) =152858a(17) =90391a(18) =357015a(19) =192587a(20) =737545a(21) =381508a(22) =1434489a(23) =667157a(24) =2507225a(25) =895538a(26) =3385348a(27) =777673a(28) =3022948a(29) =342738