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Number of self-avoiding closed paths on an n X 6 grid which pass through four corners ((0,0), (0,5), (n-1,5), (n-1,0)).

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`%I #8 Nov 28 2022 09:59:28
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`%S 1,17,229,3105,44930,674292,10217420,154980130,2350703747,35658264301,
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`%T 540957030465,8206939419403
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`%N Number of self-avoiding closed paths on an n X 6 grid which pass through four corners ((0,0), (0,5), (n-1,5), (n-1,0)).
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`%C Also number of self-avoiding closed paths on a 6 X n grid which pass through four corners ((0,0), (0,5), (n-1,5), (n-1,0)).
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`%Y Column k=6 of A333513.
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`%Y Cf. A358697.
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`%K nonn,more
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`%O 2,2
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`%A _Seiichi Manyama_, Nov 28 2022
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