190305domain: NAppears in sequencesNumber of (n+1) X 6 0..2 arrays with all 2 X 2 subblock sums the same.at n=8A183999Place n points in general position on each side of an equilateral triangle, and join every pair of the 3*n+3 boundary points by a chord; sequence gives number of edges in the resulting planar graph.at n=14A367119