Search: id:A140440
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%I A140440
%S A140440 0,0,0,0,1,1,2,5,12,40,154,766,4672,34547,302185,3073267,35933851
%N A140440 Number of n-node biconnected graphs with girth at least 5.
%e A140440 The 5 graphs of order 8 are:
%e A140440 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;
%e A140440 0: 4 5; 1: 4 6; 2: 5 7; 3: 6 7; 4: 0 1; 5: 0 2; 6: 1 3; 7: 2 3;
%e A140440 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;
%e A140440 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;
%e A140440 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.
%Y A140440 Cf. A126757.
%Y A140440 Sequence in context: A050258 A051436 A054581 this_sequence A005664 A009739 
               A062272
%Y A140440 Adjacent sequences: A140437 A140438 A140439 this_sequence A140441 A140442 
               A140443
%K A140440 nonn
%O A140440 1,7
%A A140440 Brendan McKay, Jun 17 2008

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