a(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 2 mod 3}.

A024399

a(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 2 mod 3}.

Terms

    a(0) =5a(1) =31a(2) =101a(3) =248a(4) =515a(5) =952a(6) =1619a(7) =2586a(8) =3930a(9) =5738a(10) =8107a(11) =11141a(12) =14954a(13) =19670a(14) =25420a(15) =32345a(16) =40596a(17) =50331a(18) =61718a(19) =74935a(20) =90167a(21) =107609a(22) =127466a(23) =149950a(24) =175283a(25) =203697a(26) =235431a(27) =270734a(28) =309865a(29) =353090

External references