The Wiener index of the cyclic phenylene with n hexagons (n>=3).

Terms

a(0) =459a(1) =1008a(2) =1845a(3) =3024a(4) =4599a(5) =6624a(6) =9153a(7) =12240a(8) =15939a(9) =20304a(10) =25389a(11) =31248a(12) =37935a(13) =45504a(14) =54009a(15) =63504a(16) =74043a(17) =85680a(18) =98469a(19) =112464a(20) =127719a(21) =144288a(22) =162225a(23) =181584a(24) =202419a(25) =224784a(26) =248733a(27) =274320a(28) =301599a(29) =330624