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A286913
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Number of edge covers in the grid graph P_n X P_n.
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6
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0, 7, 969, 2180738, 68534828391, 30833670159649637, 197887615273032627789510, 18126687290150589819559507400227, 23696879029605485832353513435527035363501, 442121584517675331278913696274915728729945474905362
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refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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A286912 = Cases[Import["https://oeis.org/A286912/b286912.txt", "Table"], {_, _}][[All, 2]];
a[n_] := A286912[[2 n^2 - 2 n + 1]]; a[1] = 1;
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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