Number of distinct lines through the origin in 6-dimensional cube of side length n.

Terms

a(0) =0a(1) =63a(2) =665a(3) =3969a(4) =14833a(5) =45801a(6) =112825a(7) =257257a(8) =515025a(9) =980217a(10) =1720145a(11) =2934505a(12) =4693473a(13) =7396137a(14) =11112129a(15) =16464385a(16) =23555441a(17) =33430033a(18) =45927505a(19) =62881561a(20) =83865257a(21) =111331241a(22) =144772201a(23) =187839225a(24) =238778281a(25) =303522401a(26) =379323785