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A324061
Number of connected graphs on n unlabeled nodes with radius 2.
1
0, 0, 0, 2, 10, 76, 682, 9864, 245518, 11366961
OFFSET
1,4
LINKS
Eric Weisstein's World of Mathematics, Graph Radius
CROSSREFS
Column k=2 of A324239.
Sequence in context: A321394 A320956 A355349 * A307524 A066223 A355110
KEYWORD
nonn,more
AUTHOR
Andrew Howroyd, Sep 03 2019
STATUS
approved