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A358713 Number of self-avoiding closed paths on an n X 7 grid which pass through four corners ((0,0), (0,6), (n-1,6), (n-1,0)).

%I A358713 #14 Nov 28 2022 10:02:04
%S A358713 1,41,1081,26515,674292,17720400,471468756,12570253556,335101401877,
%T A358713 8932110760401,238088717357193,6346541968642151,169176879483125528,
%U A358713 4509681115981777876,120212775466066851264,3204464007623702644476,85420126381414152110475,2277010595175522782497635
%N A358713 Number of self-avoiding closed paths on an n X 7 grid which pass through four corners ((0,0), (0,6), (n-1,6), (n-1,0)).
%C A358713 Also number of self-avoiding closed paths on a 7 X n grid which pass through four corners ((0,0), (0,6), (n-1,6), (n-1,0)).
%H A358713 Seiichi Manyama, <a href="/A358713/b358713.txt">Table of n, a(n) for n = 2..50</a>
%Y A358713 Column k=7 of A333513.
%Y A358713 Cf. A358698.
%K A358713 nonn
%O A358713 2,2
%A A358713 _Seiichi Manyama_, Nov 28 2022