%I A143246
%S A143246 0,2,0,12,0,2144,0,9277152,0,934520913216,0,2152453777211211412,0,
%T A143246 112252999240982874562527216,0,131765033045251672652319572331061144,0,
%U A143246 3467852755777932367855581588111341658695967892,0
%N A143246 Number of (directed) Hamiltonian circuits in the n X n grid graph.
%H A143246 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               GridGraph.html">GridGraph</a>
%H A143246 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               HamiltonianCircuit.html">HamiltonianCircuit</a>
%Y A143246 Cf. A003763.
%Y A143246 Sequence in context: A167345 A156431 A067994 this_sequence A104014 A002929 
               A112261
%Y A143246 Adjacent sequences: A143243 A143244 A143245 this_sequence A143247 A143248 
               A143249
%K A143246 nonn
%O A143246 1,2
%A A143246 E. W. Weisstein (eric(AT)weisstein.com), Aug 01, 2008