1,5
Eric Weisstein's World of Mathematics, Class 2 Graph
Cf. A099437.
Adjacent sequences: A099435 A099436 A099437 this_sequence A099439 A099440 A099441
Sequence in context: A072044 A127138 A064081 this_sequence A002178 A013558 A161000
nonn,more
Eric Weisstein (eric(AT)weisstein.com), Oct 15, 2004
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