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A007867 Complementary pairs of `homogenized' N-free graphs with n nodes. 0
1, 1, 2, 7, 22, 82, 307 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

I believe this is an erroneous version of A241156. - N. J. A. Sloane, Apr 18 2014

LINKS

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

Jacinta Covington, A universal structure for N-free graphs, Proc. London Math. Soc. (3) 58 (1989), no. 1, 1--16. MR0969544 (89m:03028). - N. J. A. Sloane, Apr 18 2014

CROSSREFS

Cf. A241156.

Sequence in context: A110137 A097967 A052879 * A241156 A014558 A150322

Adjacent sequences:  A007864 A007865 A007866 * A007868 A007869 A007870

KEYWORD

nonn

AUTHOR

Peter J. Cameron

STATUS

approved

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Last modified October 22 12:47 EDT 2019. Contains 328318 sequences. (Running on oeis4.)