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A241841
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Number of simple connected graphs on n nodes that are not trees.
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5
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0, 0, 1, 4, 18, 106, 842, 11094, 261033, 11716465, 1006700330, 164059829925, 50335907867918, 29003487462844902, 31397381142761234219, 63969560113225176156957, 245871831682084026519479939, 1787331725248899088890200452713, 24636021429399867655322650759363689
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,4
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LINKS
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Eric Weisstein's World of Mathematics, Tree
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FORMULA
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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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