Maximum of |det(A)| where A is an n X n circulant (0,1) matrix over the integers.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =9a(6) =32a(7) =45a(8) =95a(9) =275a(10) =1458a(11) =2240a(12) =6561a(13) =19952a(14) =131072a(15) =214245a(16) =755829a(17) =2994003a(18) =19531250a(19) =37579575a(20) =134534444a(21) =577397064a(22) =4353564672a(23) =10757577600a(24) =31495183733a(25) =154611524732a(26) =738139162166