1,5
Eric Weisstein's World of Mathematics, Class 2 Graph
Cf. A099438.
Sequence in context: A038265 A015440 A094555 this_sequence A077701 A152448 A073219
Adjacent sequences: A099434 A099435 A099436 this_sequence A099438 A099439 A099440
nonn,more
Eric Weisstein (eric(AT)weisstein.com), Oct 15, 2004
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