

A286913


Number of edge covers in the grid graph P_n X P_n.


6



0, 7, 969, 2180738, 68534828391, 30833670159649637, 197887615273032627789510, 18126687290150589819559507400227, 23696879029605485832353513435527035363501, 442121584517675331278913696274915728729945474905362
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OFFSET

1,2


LINKS



MATHEMATICA

A286912 = Cases[Import["https://oeis.org/A286912/b286912.txt", "Table"], {_, _}][[All, 2]];
a[n_] := A286912[[2 n^2  2 n + 1]]; a[1] = 1;


CROSSREFS



KEYWORD

nonn


AUTHOR



EXTENSIONS



STATUS

approved



