Maximum determinant of an n X n circulant (1,-1)-matrix.

Terms

a(0) =1a(1) =0a(2) =4a(3) =16a(4) =48a(5) =128a(6) =512a(7) =2304a(8) =6912a(9) =22528a(10) =273408a(11) =2097152a(12) =14929920a(13) =50331648a(14) =390905856a(15) =1644167168a(16) =12279939072a(17) =69660573696a(18) =865782202368