Number of vertices of even degree in a cubic lattice n X n X n.

Terms

a(0) =0a(1) =0a(2) =13a(3) =32a(4) =63a(5) =112a(6) =185a(7) =288a(8) =427a(9) =608a(10) =837a(11) =1120a(12) =1463a(13) =1872a(14) =2353a(15) =2912a(16) =3555a(17) =4288a(18) =5117a(19) =6048a(20) =7087a(21) =8240a(22) =9513a(23) =10912a(24) =12443a(25) =14112a(26) =15925a(27) =17888a(28) =20007a(29) =22288