a(n) = determinant of n X n circulant matrix whose first row is the first n triangular numbers A000217(0), A000217(1), ... A000217(n-1).

A118705

a(n) = determinant of n X n circulant matrix whose first row is the first n triangular numbers A000217(0), A000217(1), ... A000217(n-1).

Terms

    a(0) =0a(1) =-1a(2) =28a(3) =-1360a(4) =105500a(5) =-12051585a(6) =1908871832a(7) =-400855203840

External references