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A052442
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Number of simple unlabeled n-node graphs of connectivity 1.
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11
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0, 1, 1, 3, 11, 56, 385, 3994, 67014, 1973029, 105731474, 10439496931, 1902968718515, 641662974453892, 401490336727861176, 467924684115578671326, 1019752390010650509117288, 4171131179469162937375841939, 32134378048921787829834095722663, 467778894124037894839737804918978194
(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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FORMULA
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MATHEMATICA
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A001349 = Cases[Import["https://oeis.org/A001349/b001349.txt", "Table"], {_, _}][[All, 2]];
A002218 = Cases[Import["https://oeis.org/A002218/b002218.txt", "Table"], {_, _}][[All, 2]];
a[1] = 0; a[2] = 1;
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CROSSREFS
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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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