Kissing number of n-dimensional lattice Kappa_n.

Terms

a(0) =0a(1) =2a(2) =6a(3) =12a(4) =24a(5) =40a(6) =72a(7) =92a(8) =132a(9) =180a(10) =276a(11) =432a(12) =756a(13) =918a(14) =1232a(15) =1746a(16) =3290a(17) =4266