A007866 Number of `homogenized' N-free graphs with n nodes.

1, 2, 4, 14, 44, 164, 614

Offset

1,2

Links

Table of n, a(n) for n=1..7.

P. J. Cameron, Sequences realized by oligomorphic permutation groups, J. Integ. Seqs. Vol. 3 (2000), #00.1.5.

Jacinta Covington, A universal structure for N-free graphs, Proc. London Math. Soc. (3) 58 (1989), no. 1, 1--16. MR0969544 (89m:03028).

Crossrefs

Sequence in context: A243323 A128750 A047152 * A226909 A121751 A327644

Adjacent sequences: A007863 A007864 A007865 * A007867 A007868 A007869

Keyword

nonn,more

Author

Peter J. Cameron

Status

approved