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• Triangular number, the number of entries in such an array up to some particular row

cite-note-11. ↑ citerefshallit1980Shallit, Jeffrey (1980), "A triangle for the Bell numbers" (PDF), in Hoggatt, Verner E. Jr.; Bicknell-Johnson, Marjorie (eds.), A collection of manuscripts related to the Fibonacci sequence, Santa Clara, Calif.: Fibonacci Association, pp. 69–71, MR 0624091.

cite-note-22. ↑ citerefkitaevliese2013Kitaev, Sergey; Liese, Jeffrey (2013), "Harmonic numbers, Catalan's triangle and mesh patterns" (PDF), Discrete Mathematics, 313 (14): 1515–1531, arXiv:1209.6423, doi:10.1016/j.disc.2013.03.017, MR 3047390, S2CID 18248485.

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