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A099436
Number of simple connected class-1 graphs on n nodes.
2
1, 1, 1, 6, 17, 109, 821, 11050, 260150
OFFSET
1,4
LINKS
Eric Weisstein's World of Mathematics, Class 1 Graph
CROSSREFS
Cf. A099435 (number of simple class-1 graphs on n nodes).
Cf. A099438 (number of connected class-2 graphs on n nodes).
Sequence in context: A154494 A130278 A024080 * A209482 A209341 A376134
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 15 2004
EXTENSIONS
More terms from Vladeta Jovovic, Jun 30 2007
Verified up to a(9) by Eric W. Weisstein, Nov 21 2011
STATUS
approved