296380domain: NAppears in sequencesa(n) = [ (3rd elementary symmetric function of S(n))/(first elementary symmetric function of S(n)) ], where S(n) = {first n+2 positive integers congruent to 1 mod 3}.at n=28A024220a(n) = n*(n+1)*(n^2-2*n+2)/2.at n=28A101375