%I #6 Nov 24 2018 01:32:23
%S 1,1,-1,-5,-30,-174,-1120
%N Coefficients in expansion of determinant of the Ihara Laplacian on the infinite grid Z x Z.
%H Bryan Clair, <a href="http://www.combinatorics.org/ojs/index.php/eljc/article/view/v21i2p16">The Ihara zeta function of the infinite grid</a>, Electron. J. Combin., 21(2) (2014), #P2.16.
%K sign,more
%O 0,4
%A _N. J. A. Sloane_, May 12 2014