a(n) = the Wiener index of the Fibonacci cube G_n.

Terms

a(0) =0a(1) =1a(2) =4a(3) =16a(4) =54a(5) =176a(6) =548a(7) =1667a(8) =4968a(9) =14592a(10) =42348a(11) =121728a(12) =347112a(13) =983173a(14) =2768812a(15) =7758928a(16) =21648546a(17) =60172784a(18) =166687436a(19) =460356359a(20) =1267964496a(21) =3483818880a(22) =9550754520a(23) =26129950080a(24) =71356349520a(25) =194529354505a(26) =529485228244