hexagonal number
"Hexagonal numbers" are figurate numbers representing hexagonal shapes and are part of polygonal number sequences.
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Definition
C1Number Theory
(technical, academic)A number that can be arranged in the shape of a regular hexagon.
Example
- The number 15 is a hexagonal number because it can form a hexagon with three layers of dots.
C1Number Theory
(technical, academic)A figurate number calculated by the formula n(2n-1), where n is a positive integer.
Example
- Using the formula, the fifth hexagonal number is 5(2*5-1) = 45.
Similar
Terms that have similar or relatively close meanings to "hexagonal number":