T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical zero neighbors
1, 2, 2, 2, 2, 2, 3, 4, 4, 3, 4, 6, 10, 6, 4, 5, 10, 18, 18, 10, 5, 7, 16, 38, 42, 38, 16, 7, 9
1 seqfan posts
Sun Oct 9 20:15:11 CEST 2011 [seqfan] Vaguely Self-Referential "Number of Zero Neighbors"