47299domain: NAppears in sequencesa(n) = 4*n^5 + 10*n^4 + 13*n^3 + 11*n^2 + 5*n + 1.at n=6A094201Number of cograph contraction perfect graphs on n nodes.at n=8A123415Arises from enumeration of a certain class of zig-zag knight's paths on the square grid.at n=28A368377