1. Square pyramidal numberIn mathematics, a pyramid number, or square pyramidal number, is a figurate number that represents the number of stacked spheres in a pyramid with a square base. Square pyramidal numbers also solve the problem of counting the number of squares in an n × n grid.
Read “Square pyramidal number” on English Wikipedia
Read “四角錐数” on Japanese Wikipedia
Read “Square pyramidal number” on DBpedia
Read “Square pyramidal number” on English Wikipedia
Read “四角錐数” on Japanese Wikipedia
Read “Square pyramidal number” on DBpedia
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