A179072 for p == 1 (mod 4).A179074A179072 for p == 1 (mod 4).Terms a(0) =-2a(1) =-32a(2) =256a(3) =-8192a(4) =-262144a(5) =5242880a(6) =-33554432a(7) =-2684354560External referencesoeis: A179074