284000domain: NAppears in sequencesNumber of points of L1 norm 6 in cubic lattice Z^n.at n=12A035600Coordination sequence for 12-dimensional cubic lattice.at n=6A035707Coordination sequence for C_12 lattice.at n=3A035749a(n) = Sum_{k=0..n} binomial(2*n,k) * binomial(3*n-k-1,n-k).at n=6A370099