A263324 - OEIS

A263324

Triangle read by rows: T(n,k) is the number of unlabeled simple graphs with n vertices and Grundy number k, 0 <= k < n.

1, 1, 1, 1, 2, 1, 1, 5, 4, 1, 1, 8, 18, 6, 1, 1, 15, 67, 63, 9, 1

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

OFFSET

1,5

COMMENTS

The Grundy number of a graph is the largest k such that the graph has a greedy k-coloring for some ordering of its vertices. - Charles R Greathouse IV, Oct 16 2015

LINKS

Table of n, a(n) for n=1..21.

FindStat - Combinatorial Statistic Finder, The Grundy number of a graph.

Wikipedia, Grundy number.

EXAMPLE

Triangle begins:

1, 1;

1, 2, 1;

1, 5, 4, 1;

1, 8, 18, 6, 1;

1, 15, 67, 63, 9, 1;

...

CROSSREFS

Row sums are A000088.

Sequence in context: A316399 A139347 A288620 * A284949 A263294 A241500

Adjacent sequences: A263321 A263322 A263323 * A263325 A263326 A263327

KEYWORD

nonn,tabl,more

AUTHOR

Christian Stump, Oct 14 2015

STATUS

approved