A024531 - OEIS

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.

%I #4 Mar 30 2012 18:55:55

%S 0,1,3,6,10,16,23,32,42,55,70,87,106,126,148,173,201,230,262,296,331,

%T 369,409,452,499,548,598,650,703,758,820,883,950,1018,1091,1164,1241,

%U 1321,1402,1487,1575,1664,1757,1852

%N 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.

%K nonn

%O 2,3

%A _Clark Kimberling_