[ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 3}.

A024223

[ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 3}.

Terms

    a(0) =1a(1) =12a(2) =45a(3) =115a(4) =244a(5) =457a(6) =785a(7) =1262a(8) =1926a(9) =2822a(10) =3997a(11) =5504a(12) =7400a(13) =9746a(14) =12608a(15) =16057a(16) =20168a(17) =25021a(18) =30699a(19) =37290a(20) =44888a(21) =53591a(22) =63500a(23) =74722a(24) =87368a(25) =101553a(26) =117397a(27) =135026a(28) =154567a(29) =176154

External references