%I #6 Apr 09 2014 10:12:24
%S 1,2,6,30,60,420,840,280,2520,2520,2520,27720,27720,27720,471240,
%T 942480,314160,9110640,9110640,1822128,41908944,209544720,2724081360,
%U 908027120,17252515280,17252515280,17252515280,17252515280,465817912560
%N a(n) = denominator of sum{k=1 to n} 1/A127515(k).
%Y Cf. A127515, A127516.
%K frac,nonn
%O 1,2
%A _Leroy Quet_, Jan 17 2007
%E Extended by _Ray Chandler_, Jan 22 2007