1,2
M. A. Sainte-Lagu\"{e}, Les R\'{e}seaux (ou Graphes)}, M\'{e}morial des Sciences Math\'{e}matiques, Fasc. 18, Gauthier-Villars, Paris, 1926, p. 49.
Sequence in context: A019237 A019238 A135704 this_sequence A019428 A055252 A116414
Adjacent sequences: A002561 A002562 A002563 this_sequence A002565 A002566 A002567
nonn
njas
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