%I #4 Mar 30 2012 16:50:30
%S 0,6,81,2420,158487,22668546,7067228903,4796951277784,
%T 7083189530689311,22740544515287098346,158673902903632923216807,
%U 2405521769596577026409223804,79215226453280152797069512845071
%N "Hamiltonian cow patches" on the square lattice (see Jensen web site for further information).
%H I. Jensen, <a href="/A121790/b121790.txt">Table of n, a(n) for n = 1..18</a> [from the Jensen link below]
%H I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/saw/SAW_ser.html">Series Expansions for Self-Avoiding Walks</a>
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Aug 30 2006
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