120759domain: NAppears in sequencesNumber of ways to place zero or more nonadjacent 2,0 3,1 4,2 4,3 4,4 5,2 6,2 7,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155448Semiprimes sp of the form p^2 + q + 1 where p and q are consecutive primes.at n=24A242243