448876domain: NAppears in sequences6-dimensional centered tetrahedral numbers.at n=18A008500a(n) = Hermite(n,13).at n=4A158542The 4th Hermite Polynomial evaluated at n: H_4(n) = 16n^4 - 48n^2 + 12.at n=13A163323a(n) = Sum_{k=0..n} binomial(3*n+k,n).at n=6A387117