منابع مشابه
Some Easily Derivable Integer Sequences
We propose and discuss several simple ways of obtaining new enumerative sequences from existing ones. For instance, the number of graphs considered up to the action of an involutory transformation is expressible as the semi-sum of the total number of such graphs and the number of graphs invariant under the involution. Another, less familiar idea concerns evenand odd-edged graphs: the difference...
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ژورنال
عنوان ژورنال: Journal of the Japanese Technical Association of the Pulp and Paper Industry
سال: 1948
ISSN: 1884-4731
DOI: 10.2524/jtappij1947.2.18