225081383184domain: NAppears in sequencesa(n) = Hermite(n, 21).at n=7A158727The 7th Hermite Polynomial evaluated at n: H_7(n) = 128*n^7 -1344*n^5 + 3360*n^3 - 1680*n.at n=21A247852a(n) = H(n, 3*n), where H(n,x) is n-th Hermite polynomial.at n=7A349069