OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Clique Number
Eric Weisstein's World of Mathematics, Paley Graph
EXAMPLE
a(1) = 1 because the subgraph of the Paley graph of order 5 induced by {1,4} is the two-vertex empty graph.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jeremy F. Alm, Oct 21 2018
STATUS
approved