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A145773
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Number of n X n binary arrays with all ones connected only either two adjacent vertically or two adjacent horizontally.
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1
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1, 5, 25, 314, 7358, 349511, 32855368, 6141909014, 2284689480141, 1689669248970784, 2485350221377308028, 7269523179423750332937, 42286820404292801713317670, 489171492515135237008883532896
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OFFSET
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1,2
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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