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A319897 Number of connected regular loopless multigraphs on n unlabeled nodes with degree up to n. 2
1, 1, 2, 1, 6, 7, 195, 984, 648947, 35494648, 689162614688, 250087643676776, 116889497942206867366 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
Initial terms computed using 'Nauty and Traces'.
LINKS
Brendan McKay and Adolfo Piperno, Nauty and Traces
FORMULA
a(n) = Sum_{k=0..n} A328682(n, k). - Andrew Howroyd, Mar 18 2020
CROSSREFS
Sequence in context: A358723 A243320 A363470 * A350009 A350010 A193734
KEYWORD
nonn,more
AUTHOR
Natan Arie Consigli, Nov 28 2018
EXTENSIONS
a(1), a(8) corrected and a(10)-a(12) added by Andrew Howroyd, Mar 18 2020
STATUS
approved

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Last modified March 5 03:04 EST 2024. Contains 370537 sequences. (Running on oeis4.)