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5thheptagonalnumber
<-- Enter heptagonal number statement
Calculate heptagonal number 5
The formula for heptagonal number n is as follows
H
n
=
n(5n - 3)
2
Given n = 5, we have:
H
5
=
5(5(5) - 3)
2
H
5
=
5(25 - 3)
2
H
5
=
5(22)
2
H
5
=
110
2
H
5
=
55
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