%I #2 Mar 30 2012 18:59:02
%S 1,4,16,32,128,256,512,2048,8192,16384,32768,131072,262144,1048576,
%T 4194304,8388608,33554432,67108864,134217728,536870912,1073741824,
%U 4294967296,17179869184,34359738368,68719476736,274877906944
%N a(n)=Product{k=0..n, 1+3^A010060(k)}/2.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Dec 10 2004