164317593600domain: NAppears in sequencesCoordination sequence for diamond structure D^+_14. (Edges defined by l_1 norm = 1.)at n=21A035883a(n) = 2^(n-1)*binomial(2*n-1, n).at n=13A069720E.g.f. BesselI(0,2*sqrt(2)*x) + BesselI(1,2*sqrt(2)*x)/sqrt(2).at n=27A098660