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A241706 Number of simple connected graphs on n nodes with diameter 2 6
0, 0, 1, 4, 14, 59, 373, 4154, 91518, 4116896 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

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

Travis Hoppe and Anna Petrone, Encyclopedia of Finite Graphs

T. Hoppe and A. Petrone, Integer sequence discovery from small graphs, arXiv preprint arXiv:1408.3644, 2014

Peter Steinbach, Field Guide to Simple Graphs, Volume 1, Part 17 [But beware errors] (For Volumes 1, 2, 3, 4 of this book see A000088, A008406, A000055, A000664, respectively.)

Eric Weisstein's World of Mathematics, Graph Diameter

CROSSREFS

Column k=2 of A294522.

Simple connected graphs of diameter k: A241706, A241707, A241708, A241709, A241710.

Sequence in context: A104987 A149492 A307488 * A111276 A149493 A299926

Adjacent sequences:  A241703 A241704 A241705 * A241707 A241708 A241709

KEYWORD

nonn,hard,more

AUTHOR

Travis Hoppe and Anna Petrone, Apr 27 2014

STATUS

approved

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Last modified April 6 11:38 EDT 2020. Contains 333273 sequences. (Running on oeis4.)