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%I #16 Jan 10 2019 22:39:24
%S 1,7,160,11408,2522191,1718769373,3598611604598,23098353998190640,
%T 453839082673896579243,27266319759961440667165921,
%U 5005013940387988257218110301496,2805250606288167736619664411164848668
%N "Cow patches" on the square lattice (see Jensen web site for further information).
%H I. Jensen, <a href="/A121786/b121786.txt">Table of n, a(n) for n = 1..19</a> [from the Jensen link below]
%H M. Bousquet-Mélou, A. J. Guttmann, Iwan Jensen, <a href="http://dx.doi.org/10.1088/0305-4470/38/42/001">Self-avoiding walks crossing a square</a>, J. Phys. A: Math. Gen. 38 (2005) 9159-9181, Table 2.
%H I. Jensen, <a href="https://web.archive.org/web/20070612141707/http://www.ms.unimelb.edu.au/~iwan/saw/SAW_ser.html">Series Expansions for Self-Avoiding Walks</a>.
%H I. Jensen, <a href="https://web.archive.org/web/20070613021812/http://www.ms.unimelb.edu.au/~iwan/saw/series/saw_cowpatch.ser">Cow patches</a>.
%Y Cf. A007764, A121785.
%K nonn
%O 1,2
%A _N. J. A. Sloane_, Aug 30 2006
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