1,1
Eric Weisstein's World of Mathematics, Hamiltonian Path
Eric Weisstein's World of Mathematics, Andrasfai Graph
Sequence in context: A059475 A156296 A003046 * A057565 A152804 A188490
Adjacent sequences: A137881 A137882 A137883 * A137885 A137886 A137887
nonn,more
E. W. Weisstein (eric(AT)weisstein.com), Feb 20, 2008
a(6), a(7) from Max Alekseyev (maxale(AT)gmail.com), May 21 2011