Rounded volume of a regular icosahedron with edge length n.

Terms

a(0) =0a(1) =2a(2) =17a(3) =59a(4) =140a(5) =273a(6) =471a(7) =748a(8) =1117a(9) =1590a(10) =2182a(11) =2904a(12) =3770a(13) =4793a(14) =5987a(15) =7363a(16) =8936a(17) =10719a(18) =12724a(19) =14964a(20) =17454a(21) =20205a(22) =23231a(23) =26545a(24) =30160a(25) =34089a(26) =38345a(27) =42942a(28) =47893a(29) =53209