Recursion formulae of 1l?+?2l?+?···?+?nland their combinatoric meaning in terms of the tree diagrams

• Autores: Yukio Kobayashi
• Localización: International journal of mathematical education in science and technology, ISSN 0020-739X, Vol. 44, Nº. 1, 2013, págs. 132-142
• Idioma: inglés
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• Resumen

  • This article derives the recursion formulae of and demonstrates through tree diagrams how the formulae for the cases of l?=?1,?2,?3 are closely related. Visual thinking by diagrams is pedagogically significant for observing patterns hidden in the formulae for .