296798domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 4,2 5,3 6,3 7,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A1554030-sequence of reduction of binomial coefficient sequence B(n,4)=A000332 by x^2 -> x+1.at n=12A192248