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A360868
Number of unlabeled connected loopless multigraphs with circuit rank n and degree >= 3 at each node.
2
0, 1, 4, 23, 172, 1848, 25684
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..7.
FORMULA
a(n) = Sum_{k>=1}
A360866
(n + k - 1, k).
CROSSREFS
Diagonal sums of
A360866
.
Cf.
A360864
,
A360867
,
A360879
.
Sequence in context:
A317276
A113869
A084357
*
A075729
A328006
A127131
Adjacent sequences:
A360865
A360866
A360867
*
A360869
A360870
A360871
KEYWORD
nonn
,
hard
,
more
AUTHOR
Andrew Howroyd
, Feb 25 2023
STATUS
approved
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Last modified August 24 18:44 EDT 2024. Contains 375417 sequences. (Running on oeis4.)