a(n) = [ (2nd elementary symmetric function of P(n))/(first elementary symmetric function of P(n)) ], where P(n) = {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1.

A024531

a(n) = [ (2nd elementary symmetric function of P(n))/(first elementary symmetric function of P(n)) ], where P(n) = {1, p(1), p(2), ..., p(n-1)}, where p(0) = 1.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =6a(4) =10a(5) =16a(6) =23a(7) =32a(8) =42a(9) =55a(10) =70a(11) =87a(12) =106a(13) =126a(14) =148a(15) =173a(16) =201a(17) =230a(18) =262a(19) =296a(20) =331a(21) =369a(22) =409a(23) =452a(24) =499a(25) =548a(26) =598a(27) =650a(28) =703a(29) =758

External references