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A241706
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Number of simple connected graphs on n nodes with diameter 2
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6
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OFFSET
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1,4
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LINKS
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Peter Steinbach, Field Guide to Simple Graphs, Volume 1, Part 17 [But beware errors] (For Volumes 1, 2, 3, 4 of this book see A000088, A008406, A000055, A000664, respectively.)
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CROSSREFS
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KEYWORD
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nonn,hard,more
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AUTHOR
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STATUS
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approved
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