a(n) = 2^n*A141316(n).A185281a(n) = 2^n*A141316(n).Terms a(0) =2a(1) =0a(2) =40a(3) =800a(4) =20288a(5) =606400a(6) =20971904a(7) =825910528a(8) =36572366848External referencesoeis: A185281