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Search: id:A140440
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| A140440 |
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Number of n-node biconnected graphs with girth at least 5. |
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+0
2
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| 0, 0, 0, 0, 1, 1, 2, 5, 12, 40, 154, 766, 4672, 34547, 302185, 3073267, 35933851
(list; graph; listen)
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OFFSET
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1,7
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EXAMPLE
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The 5 graphs of order 8 are:
0: 4 6; 1: 5 6; 2: 5 7; 3: 6 7; 4: 0 7; 5: 1 2; 6: 0 1 3; 7: 2 3 4;
0: 4 5; 1: 4 6; 2: 5 7; 3: 6 7; 4: 0 1; 5: 0 2; 6: 1 3; 7: 2 3;
0: 4 5; 1: 4 6; 2: 5 7; 3: 6 7; 4: 0 1 7; 5: 0 2; 6: 1 3; 7: 2 3 4;
0: 4 5; 1: 4 7; 2: 5 6; 3: 6 7; 4: 0 1 6; 5: 0 2 7; 6: 2 3 4; 7: 1 3 5;
0: 3 6; 1: 4 6; 2: 5 6; 3: 0 7; 4: 1 7; 5: 2 7; 6: 0 1 2; 7: 3 4 5.
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CROSSREFS
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Cf. A126757.
Sequence in context: A050258 A051436 A054581 this_sequence A005664 A009739 A062272
Adjacent sequences: A140437 A140438 A140439 this_sequence A140441 A140442 A140443
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KEYWORD
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nonn
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AUTHOR
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Brendan McKay, Jun 17 2008
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