a(0)=4, a(n)=a(n-1)^2 - n for n > 0.A153060a(0)=4, a(n)=a(n-1)^2 - n for n > 0.Terms a(0) =4a(1) =15a(2) =223a(3) =49726a(4) =2472675072External referencesoeis: A153060