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URL: https://oeis.org/A052438

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A052438
Number of simple unlabeled n-node graphs with 2 center nodes.
5
0, 2, 0, 2, 4, 19, 84, 821, 12485, 343572, 16164685, 1289300669
OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Graph Center
CROSSREFS
Column 2 of A294525 for n > 2.
Sequence in context: A226430 A067648 A279327 * A324045 A381895 A358405
KEYWORD
nonn,more
EXTENSIONS
a(8)-a(10) from Andrew Howroyd, Nov 02 2017
a(11)-a(12) from Sean A. Irvine, Nov 23 2021
STATUS
approved