Wiener index of the n-pan graph.

Terms

a(0) =1a(1) =4a(2) =8a(3) =16a(4) =26a(5) =42a(6) =61a(7) =88a(8) =119a(9) =160a(10) =206a(11) =264a(12) =328a(13) =406a(14) =491a(15) =592a(16) =701a(17) =828a(18) =964a(19) =1120a(20) =1286a(21) =1474a(22) =1673a(23) =1896a(24) =2131a(25) =2392a(26) =2666a(27) =2968a(28) =3284a(29) =3630