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Heptagonal number
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Mathematics
Fields of mathematics
Arithmetic
Numbers
Figurate numbers
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A
heptagonal number
is
a
figurate number
that represents
a
heptagon
(
a
seven-sided
polygon)
. The
formula
for the \(
n
\)-th
heptagonal number
\(
H
_
n
\) is given by: \[
H
_
n
= \frac{
n
(5n -
3
)}{
2
} \] where \(
n
\) is
a
positive
integer
.
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Figurate numbers
Numbers
Arithmetic
Fields of mathematics
Mathematics
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