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A243315
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Number of ways to reciprocally link elements of an n X 9 array either to themselves or to exactly one king-move neighbor.
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2
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1, 55, 237472, 371654153, 757341382671, 1450226501771584, 2820152941289640505, 5463664833842177843423, 10594819370472223969569120, 20540255065209806005525289313, 39823725482559144291828665014967, 77209746313875957204633819730760448
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OFFSET
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0,2
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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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