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A099435
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Number of simple class-1 graphs on n nodes.
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2
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OFFSET
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1,2
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COMMENTS
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First six terms look like the Euler transform of A099436, but the 7th isn't. - Vladeta Jovovic, Jun 30 2007; Eric Weisstein (eric@Weisstein.com), Nov 4 2011
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LINKS
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Table of n, a(n) for n=1..9.
Eric Weisstein's World of Mathematics, Class 1 Graph
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CROSSREFS
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Cf. A099436 (counts of connected class 1 graphs).
Cf. A099437 (counts of class 2 graphs).
Sequence in context: A171190 A216332 A007029 * A140453 A037169 A058953
Adjacent sequences: A099432 A099433 A099434 * A099436 A099437 A099438
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KEYWORD
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nonn
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AUTHOR
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Eric W. Weisstein, Oct 15 2004
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EXTENSIONS
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Corrected and extended by Vladeta Jovovic, Jun 30 2007
"Correction" reverted by Eric W. Weisstein, Nov 4 2011
a(8) from Eric W. Weisstein, Nov 17 2011
a(9) from Eric W. Weisstein, Nov 21 2011
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STATUS
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approved
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