Electronic density of states of carbon nanotubes

(3,0)(4,0)(5,0)(6,0)(7,0)(8,0)(9,0)(10,0)(11,0)(12,0)(13,0)(14,0)(15,0)
(3,1)(4,1)(5,1)(6,1)(7,1)(8,1)(9,1)(10,1)(11,1)(12,1)(13,1)(14,1)(15,1)
(3,2)(4,2)(5,2)(6,2)(7,2)(8,2)(9,2)(10,2)(11,2)(12,2)(13,2)(14,2)(15,2)
(3,3)(4,3)(5,3)(6,3)(7,3)(8,3)(9,3)(10,3)(11,3)(12,3)(13,3)(14,3)(15,3)
(4,4)(5,4)(6,4)(7,4)(8,4)(9,4)(10,4)(11,4)(12,4)(13,4)(14,4)(15,4)
(5,5)(6,5)(7,5)(8,5)(9,5)(10,5)(11,5)(12,5)(13,5)(14,5)(15,5)
(6,6)(7,6)(8,6)(9,6)(10,6)(11,6)(12,6)(13,6)(14,6)(15,6)
(7,7)(8,7)(9,7)(10,7)(11,7)(12,7)(13,7)(14,7)(15,7)
(8,8)(9,8)(10,8)(11,8)(12,8)(13,8)(14,8)(15,8)
(9,9)(10,9)(11,9)(12,9)(13,9)(14,9)(15,9)
(10,10)(11,10)(12,10)(13,10)(14,10)(15,10)
(11,11)(12,11)(13,11)(14,11)(15,11)
(12,12)(13,12)(14,12)(15,12)
(13,13)(14,13)(15,13)
(14,14)(15,14)
(15,15)

Matlab file used to generate the plots.