10thheptagonalnumber

<-- Enter heptagonal number statement
  

Calculate heptagonal number 10

The formula for heptagonal number n is as follows
Hn  =  n(5n - 3)
  2

Given n = 10, we have:
H10  =  10(5(10) - 3)
  2

H10  =  10(50 - 3)
  2

H10  =  10(47)
  2

H10  =  470
  2

H10 = 235