OFFSET
1,2
LINKS
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
KEYWORD
nonn,more
AUTHOR
STATUS
approved