The hyper-Wiener index of the linear phenylene with n hexagons.

Terms

a(0) =42a(1) =396a(2) =1656a(3) =4740a(4) =10890a(5) =21672a(6) =38976a(7) =65016a(8) =102330a(9) =153780a(10) =222552a(11) =312156a(12) =426426a(13) =569520a(14) =745920a(15) =960432a(16) =1218186a(17) =1524636a(18) =1885560a(19) =2307060a(20) =2795562a(21) =3357816a(22) =4000896a(23) =4732200a(24) =5559450a(25) =6490692a(26) =7534296a(27) =8698956a(28) =9993690a(29) =11427840