128480domain: NAppears in sequencesNumber of n X 4 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=15A208283Number of triangular regions in a "frame" of size n X n (see Comments in A331776 for definition), divided by 4.at n=34A332595