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A067967
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Number of binary arrangements without adjacent 1's on n X n hexagonal staggered torus shifted for odd n.
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1
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1, 5, 19, 217, 4076, 164258, 12285477, 1834600977, 527717587843, 296979228487760, 324881629286870822, 692625866382651263578, 2874716493700380888930840, 23237986479606982160703729647, 365788614113216462103977935612524, 11213018647250714014261414954480048385
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OFFSET
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1,2
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REFERENCES
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Steven R. Finch, Mathematical Constants, Cambridge, 2003, pp. 342-349.
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LINKS
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EXAMPLE
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Neighbors for n=4:
:\|/ | \|/ |
:-o--o--o--o-
: | /|\ | /|\
:\|/ | \|/ |
:-o--o--o--o-
: | /|\ | /|\
:\|/ | \|/ |
:-o--o--o--o-
: | /|\ | /|\
:\|/ | \|/ |
:-o--o--o--o-
: | /|\ | /|\
Neighbors for n=5:
:\|/ | \|/ | \|
:-o--o--o--o--o-
: | /|\ | /|\ |\
:\|/ | \|/ | \|
:-o--o--o--o--o-
: | /|\ | /|\ |\
:\|/ | \|/ | \|
:-o--o--o--o--o-
: | /|\ | /|\ |\
:\|/ | \|/ | \|
:-o--o--o--o--o-
: | /|\ | /|\ |\
:\|/ | \|/ | \|
:-o--o--o--o--o-
: | /|\ | /|\ |\
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CROSSREFS
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For bent instead of shifted for odd n see A066865.
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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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