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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

Eric Weisstein's World of Mathematics, Graph Center

CROSSREFS

Column 2 of A294525 for n > 2.

Cf. A052437, A052439, A052440, A052441.

Sequence in context: A226430 A067648 A279327 * A324045 A209701 A158855

Adjacent sequences:  A052435 A052436 A052437 * A052439 A052440 A052441

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein

EXTENSIONS

a(8)-a(10) from Andrew Howroyd, Nov 02 2017

STATUS

approved

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)