a(n) is floor((4th elementary symmetric function of 1,2,..,n)/(3rd elementary symmetric function of 1,2,...,n)).

A024174

a(n) is floor((4th elementary symmetric function of 1,2,..,n)/(3rd elementary symmetric function of 1,2,...,n)).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2a(4) =3a(5) =4a(6) =6a(7) =8a(8) =10a(9) =13a(10) =16a(11) =19a(12) =22a(13) =25a(14) =29a(15) =33a(16) =37a(17) =42a(18) =47a(19) =52a(20) =57a(21) =62a(22) =68a(23) =74a(24) =80a(25) =87a(26) =94a(27) =101a(28) =108a(29) =115

External references