A263324 Triangle read by rows: T(n,k) (n>=1,0<=k<n) is the number of graphs with n vertices and Grundy number k.

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

Offset

1,5

Comments

Row sums give A000088, n >= 1.

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.

Example

Triangle begins:
1,
1,1,
1,2,1,
1,5,4,1,
1,8,18,6,1,
1,15,67,63,9,1,
...

Crossrefs

Cf. 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