Rounded total surface area of a regular icosahedron with edge length n.

Terms

a(0) =0a(1) =9a(2) =35a(3) =78a(4) =139a(5) =217a(6) =312a(7) =424a(8) =554a(9) =701a(10) =866a(11) =1048a(12) =1247a(13) =1464a(14) =1697a(15) =1949a(16) =2217a(17) =2503a(18) =2806a(19) =3126a(20) =3464a(21) =3819a(22) =4192a(23) =4581a(24) =4988a(25) =5413a(26) =5854a(27) =6313a(28) =6790a(29) =7283