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

Terms

a(0) =0a(1) =2a(2) =7a(3) =16a(4) =28a(5) =43a(6) =62a(7) =85a(8) =111a(9) =140a(10) =173a(11) =210a(12) =249a(13) =293a(14) =339a(15) =390a(16) =443a(17) =501a(18) =561a(19) =625a(20) =693a(21) =764a(22) =838a(23) =916a(24) =998a(25) =1083a(26) =1171a(27) =1263a(28) =1358a(29) =1457