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A001437
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Number of connected graphs with n nodes and ceiling(n(n-1)/4) edges.
(Formerly M1538 N0601)
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3
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1, 1, 2, 5, 22, 138, 1579, 33366, 1348674, 105925685, 15968704512, 4520384306832, 2402814904220039, 2425664021535713098, 4647586298937784001491, 16787189663016572148130262, 114716901953374968257425111039
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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2,3
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REFERENCES
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N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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CROSSREFS
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Largest entries in the rows of the table in A054924.
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KEYWORD
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nonn,nice
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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