4thhexagonalnumber

<-- Enter hexagonal number statement
  

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Calculate hexagonal number 4

The formula for hexagonal number n is as follows
H_n = n(2n - 1)

Given n = 4, we have:

H_n = 4(2(4) - 1)
H_n = 4(8 - 1)
H_n = 4(7)
H₄ = 28

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