Number of points on surface of tetrahedron: 2n^2 + 2 (coordination sequence for sodalite net) for n>0.
1, 4, 10, 20, 34, 52, 74, 100, 130, 164, 202, 244, 290, 340, 394, 452, 514, 580, 650
1 seqfan posts
Wed Aug 25 11:03:46 CEST 2010 [seqfan] Just for fun, more tennis balls - addendum