The Wiener index of a benzenoid consisting of a linear chain of n hexagons.

Terms

a(0) =27a(1) =109a(2) =279a(3) =569a(4) =1011a(5) =1637a(6) =2479a(7) =3569a(8) =4939a(9) =6621a(10) =8647a(11) =11049a(12) =13859a(13) =17109a(14) =20831a(15) =25057a(16) =29819a(17) =35149a(18) =41079a(19) =47641a(20) =54867a(21) =62789a(22) =71439a(23) =80849a(24) =91051a(25) =102077a(26) =113959a(27) =126729a(28) =140419a(29) =155061